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4*sin(a)^2-5+4*cos(a)^2 если a=1/2

Выражение, которое надо упростить:

Решение

Вы ввели [src]
     2               2   
4*sin (a) - 5 + 4*cos (a)
$$4 \sin^{2}{\left(a \right)} + 4 \cos^{2}{\left(a \right)} - 5$$
4*sin(a)^2 - 1*5 + 4*cos(a)^2
Общее упрощение [src]
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$$-1$$
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Собрать выражение [src]
-1
$$-1$$
-1
Степени [src]
                                         2
                     2     / I*a    -I*a\ 
     /   -I*a    I*a\      |e      e    | 
-5 - \- e     + e   /  + 4*|---- + -----| 
                           \ 2       2  / 
$$4 \left(\frac{e^{i a}}{2} + \frac{e^{- i a}}{2}\right)^{2} - \left(e^{i a} - e^{- i a}\right)^{2} - 5$$
-5 - (-exp(-i*a) + exp(i*a))^2 + 4*(exp(i*a)/2 + exp(-i*a)/2)^2
Тригонометрическая часть [src]
-1
$$-1$$
          2           2/    pi\
-5 + 4*sin (a) + 4*sin |a + --|
                       \    2 /
$$4 \sin^{2}{\left(a \right)} + 4 \sin^{2}{\left(a + \frac{\pi}{2} \right)} - 5$$
          2           2/    pi\
-5 + 4*cos (a) + 4*cos |a - --|
                       \    2 /
$$4 \cos^{2}{\left(a \right)} + 4 \cos^{2}{\left(a - \frac{\pi}{2} \right)} - 5$$
        4         4   
-5 + ------- + -------
        2         2   
     csc (a)   sec (a)
$$-5 + \frac{4}{\sec^{2}{\left(a \right)}} + \frac{4}{\csc^{2}{\left(a \right)}}$$
        4           4      
-5 + ------- + ------------
        2         2/    pi\
     sec (a)   sec |a - --|
                   \    2 /
$$-5 + \frac{4}{\sec^{2}{\left(a - \frac{\pi}{2} \right)}} + \frac{4}{\sec^{2}{\left(a \right)}}$$
        4           4      
-5 + ------- + ------------
        2         2/pi    \
     csc (a)   csc |-- - a|
                   \2     /
$$-5 + \frac{4}{\csc^{2}{\left(- a + \frac{\pi}{2} \right)}} + \frac{4}{\csc^{2}{\left(a \right)}}$$
        4           4      
-5 + ------- + ------------
        2         2/pi    \
     sec (a)   sec |-- - a|
                   \2     /
$$-5 + \frac{4}{\sec^{2}{\left(- a + \frac{\pi}{2} \right)}} + \frac{4}{\sec^{2}{\left(a \right)}}$$
          4              4      
-5 + ------------ + ------------
        2              2/pi    \
     csc (pi - a)   csc |-- - a|
                        \2     /
$$-5 + \frac{4}{\csc^{2}{\left(- a + \frac{\pi}{2} \right)}} + \frac{4}{\csc^{2}{\left(- a + \pi \right)}}$$
                             2             
5 - 8*cos(a) - 4*(1 - cos(a))  + 2*cos(2*a)
$$- 4 \left(- \cos{\left(a \right)} + 1\right)^{2} - 8 \cos{\left(a \right)} + 2 \cos{\left(2 a \right)} + 5$$
                                          2              
                        /       2/a   pi\\              2
-5 + 2*(1 + cos(2*a)) + |1 - cot |- + --|| *(1 + sin(a)) 
                        \        \2   4 //               
$$\left(- \cot^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} + 1\right)^{2} \left(\sin{\left(a \right)} + 1\right)^{2} + 2 \left(\cos{\left(2 a \right)} + 1\right) - 5$$
                                2/a   pi\  
                          16*tan |- + --|  
                                 \2   4 /  
-5 + 2*(1 - cos(2*a)) + -------------------
                                          2
                        /       2/a   pi\\ 
                        |1 + tan |- + --|| 
                        \        \2   4 // 
$$2 \cdot \left(- \cos{\left(2 a \right)} + 1\right) - 5 + \frac{16 \tan^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)}}{\left(\tan^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} + 1\right)^{2}}$$
                    2                 
       /       2/a\\            2/a\  
     4*|1 - tan |-||      16*tan |-|  
       \        \2//             \2/  
-5 + ---------------- + --------------
                   2                 2
      /       2/a\\     /       2/a\\ 
      |1 + tan |-||     |1 + tan |-|| 
      \        \2//     \        \2// 
$$\frac{4 \left(- \tan^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}}{\left(\tan^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} - 5 + \frac{16 \tan^{2}{\left(\frac{a}{2} \right)}}{\left(\tan^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}}$$
             2/a\             2/a   pi\  
       16*tan |-|       16*tan |- + --|  
              \2/              \2   4 /  
-5 + -------------- + -------------------
                  2                     2
     /       2/a\\    /       2/a   pi\\ 
     |1 + tan |-||    |1 + tan |- + --|| 
     \        \2//    \        \2   4 // 
$$-5 + \frac{16 \tan^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)}}{\left(\tan^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} + 1\right)^{2}} + \frac{16 \tan^{2}{\left(\frac{a}{2} \right)}}{\left(\tan^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}}$$
             2/a\             2/a   pi\  
       16*cot |-|       16*tan |- + --|  
              \2/              \2   4 /  
-5 + -------------- + -------------------
                  2                     2
     /       2/a\\    /       2/a   pi\\ 
     |1 + cot |-||    |1 + tan |- + --|| 
     \        \2//    \        \2   4 // 
$$-5 + \frac{16 \cot^{2}{\left(\frac{a}{2} \right)}}{\left(\cot^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} + \frac{16 \tan^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)}}{\left(\tan^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} + 1\right)^{2}}$$
                    2                         
       /       1   \                          
     4*|1 - -------|                          
       |       2/a\|                          
       |    cot |-||                          
       \        \2//              16          
-5 + ---------------- + ----------------------
                   2                 2        
      /       1   \     /       1   \     2/a\
      |1 + -------|     |1 + -------| *cot |-|
      |       2/a\|     |       2/a\|      \2/
      |    cot |-||     |    cot |-||         
      \        \2//     \        \2//         
$$\frac{4 \left(1 - \frac{1}{\cot^{2}{\left(\frac{a}{2} \right)}}\right)^{2}}{\left(1 + \frac{1}{\cot^{2}{\left(\frac{a}{2} \right)}}\right)^{2}} - 5 + \frac{16}{\left(1 + \frac{1}{\cot^{2}{\left(\frac{a}{2} \right)}}\right)^{2} \cot^{2}{\left(\frac{a}{2} \right)}}$$
       //   0     for a mod pi = 0\     //   1     for a mod 2*pi = 0\
       ||                         |     ||                           |
-5 + 4*|<   2                     | + 4*|<   2                       |
       ||sin (a)     otherwise    |     ||cos (a)      otherwise     |
       \\                         /     \\                           /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\sin^{2}{\left(a \right)} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\cos^{2}{\left(a \right)} & \text{otherwise} \end{cases}\right)\right) - 5$$
                     2                        2
       /        2/a\\      /        2/a   pi\\ 
     4*|-1 + cot |-||    4*|-1 + tan |- + --|| 
       \         \2//      \         \2   4 // 
-5 + ----------------- + ----------------------
                    2                       2  
       /       2/a\\      /       2/a   pi\\   
       |1 + cot |-||      |1 + tan |- + --||   
       \        \2//      \        \2   4 //   
$$\frac{4 \left(\tan^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} - 1\right)^{2}}{\left(\tan^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} + 1\right)^{2}} + \frac{4 \left(\cot^{2}{\left(\frac{a}{2} \right)} - 1\right)^{2}}{\left(\cot^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} - 5$$
                         2                  2
       /       2/a   pi\\      /       2/a\\ 
     4*|1 - cot |- + --||    4*|1 - tan |-|| 
       \        \2   4 //      \        \2// 
-5 + --------------------- + ----------------
                        2                  2 
      /       2/a   pi\\      /       2/a\\  
      |1 + cot |- + --||      |1 + tan |-||  
      \        \2   4 //      \        \2//  
$$\frac{4 \left(- \tan^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}}{\left(\tan^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} + \frac{4 \left(- \cot^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} + 1\right)^{2}}{\left(\cot^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} + 1\right)^{2}} - 5$$
       //   0     for a mod pi = 0\     //     1        for a mod 2*pi = 0\
       ||                         |     ||                                |
-5 + 4*|<   2                     | + 4*|<   2/    pi\                    |
       ||sin (a)     otherwise    |     ||sin |a + --|      otherwise     |
       \\                         /     \\    \    2 /                    /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\sin^{2}{\left(a \right)} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\sin^{2}{\left(a + \frac{\pi}{2} \right)} & \text{otherwise} \end{cases}\right)\right) - 5$$
       //     0        for a mod pi = 0\     //   1     for a mod 2*pi = 0\
       ||                              |     ||                           |
-5 + 4*|<   2/    pi\                  | + 4*|<   2                       |
       ||cos |a - --|     otherwise    |     ||cos (a)      otherwise     |
       \\    \    2 /                  /     \\                           /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\cos^{2}{\left(a - \frac{\pi}{2} \right)} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\cos^{2}{\left(a \right)} & \text{otherwise} \end{cases}\right)\right) - 5$$
       //     0        for a mod pi = 0\     //   1     for a mod 2*pi = 0\
       ||                              |     ||                           |
       ||     1                        |     ||   1                       |
-5 + 4*|<------------     otherwise    | + 4*|<-------      otherwise     |
       ||   2/    pi\                  |     ||   2                       |
       ||sec |a - --|                  |     ||sec (a)                    |
       \\    \    2 /                  /     \\                           /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{1}{\sec^{2}{\left(a - \frac{\pi}{2} \right)}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{1}{\sec^{2}{\left(a \right)}} & \text{otherwise} \end{cases}\right)\right) - 5$$
       //   0     for a mod pi = 0\     //     1        for a mod 2*pi = 0\
       ||                         |     ||                                |
       ||   1                     |     ||     1                          |
-5 + 4*|<-------     otherwise    | + 4*|<------------      otherwise     |
       ||   2                     |     ||   2/pi    \                    |
       ||csc (a)                  |     ||csc |-- - a|                    |
       \\                         /     \\    \2     /                    /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{1}{\csc^{2}{\left(a \right)}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{1}{\csc^{2}{\left(- a + \frac{\pi}{2} \right)}} & \text{otherwise} \end{cases}\right)\right) - 5$$
                                          //                             /    3*pi\             \
       //   1     for a mod 2*pi = 0\     ||           1             for |a + ----| mod 2*pi = 0|
       ||                           |     ||                             \     2  /             |
-5 + 4*|<   2                       | + 4*|<                                                    |
       ||cos (a)      otherwise     |     ||       4/a\        2/a\                             |
       \\                           /     ||- 4*cos |-| + 4*cos |-|           otherwise         |
                                          \\        \2/         \2/                             /
$$\left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\cos^{2}{\left(a \right)} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: \left(a + \frac{3 \pi}{2}\right) \bmod 2 \pi = 0 \\- 4 \cos^{4}{\left(\frac{a}{2} \right)} + 4 \cos^{2}{\left(\frac{a}{2} \right)} & \text{otherwise} \end{cases}\right)\right) - 5$$
                      2                           
       /         4/a\\                            
       |    4*sin |-||                            
       |          \2/|                            
     4*|1 - ---------|                 4/a\       
       |        2    |           64*sin |-|       
       \     sin (a) /                  \2/       
-5 + ------------------ + ------------------------
                     2                   2        
      /         4/a\\     /         4/a\\         
      |    4*sin |-||     |    4*sin |-||         
      |          \2/|     |          \2/|     2   
      |1 + ---------|     |1 + ---------| *sin (a)
      |        2    |     |        2    |         
      \     sin (a) /     \     sin (a) /         
$$\frac{4 \left(- \frac{4 \sin^{4}{\left(\frac{a}{2} \right)}}{\sin^{2}{\left(a \right)}} + 1\right)^{2}}{\left(\frac{4 \sin^{4}{\left(\frac{a}{2} \right)}}{\sin^{2}{\left(a \right)}} + 1\right)^{2}} - 5 + \frac{64 \sin^{4}{\left(\frac{a}{2} \right)}}{\left(\frac{4 \sin^{4}{\left(\frac{a}{2} \right)}}{\sin^{2}{\left(a \right)}} + 1\right)^{2} \sin^{2}{\left(a \right)}}$$
                                        //                                /    pi\           \
       //   0     for a mod pi = 0\     ||            0               for |a + --| mod pi = 0|
       ||                         |     ||                                \    2 /           |
-5 + 4*|<   2                     | + 4*|<                                                   |
       ||sin (a)     otherwise    |     ||            2    2/a   pi\                         |
       \\                         /     ||(1 + sin(a)) *cot |- + --|         otherwise       |
                                        \\                  \2   4 /                         /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\sin^{2}{\left(a \right)} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 0 & \text{for}\: \left(a + \frac{\pi}{2}\right) \bmod \pi = 0 \\\left(\sin{\left(a \right)} + 1\right)^{2} \cot^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} & \text{otherwise} \end{cases}\right)\right) - 5$$
       //            0               for a mod pi = 0\     //             1                for a mod 2*pi = 0\
       ||                                            |     ||                                                |
       ||/   0     for a mod pi = 0                  |     ||/   1     for a mod 2*pi = 0                    |
-5 + 4*|<|                                           | + 4*|<|                                               |
       ||<   2                          otherwise    |     ||<   2                             otherwise     |
       |||sin (a)     otherwise                      |     |||cos (a)      otherwise                         |
       \\\                                           /     \\\                                               /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\sin^{2}{\left(a \right)} & \text{otherwise} \end{cases} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\cos^{2}{\left(a \right)} & \text{otherwise} \end{cases} & \text{otherwise} \end{cases}\right)\right) - 5$$
       //      0         for a mod pi = 0\     //       1         for a mod 2*pi = 0\
       ||                                |     ||                                   |
       ||       2/a\                     |     ||              2                    |
       ||  4*cot |-|                     |     ||/        2/a\\                     |
       ||        \2/                     |     |||-1 + cot |-||                     |
-5 + 4*|<--------------     otherwise    | + 4*|<\         \2//                     |
       ||             2                  |     ||---------------      otherwise     |
       ||/       2/a\\                   |     ||              2                    |
       |||1 + cot |-||                   |     || /       2/a\\                     |
       ||\        \2//                   |     || |1 + cot |-||                     |
       \\                                /     \\ \        \2//                     /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{4 \cot^{2}{\left(\frac{a}{2} \right)}}{\left(\cot^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{\left(\cot^{2}{\left(\frac{a}{2} \right)} - 1\right)^{2}}{\left(\cot^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} & \text{otherwise} \end{cases}\right)\right) - 5$$
       //      0         for a mod pi = 0\     //      1         for a mod 2*pi = 0\
       ||                                |     ||                                  |
       ||       2/a\                     |     ||             2                    |
       ||  4*tan |-|                     |     ||/       2/a\\                     |
       ||        \2/                     |     |||1 - tan |-||                     |
-5 + 4*|<--------------     otherwise    | + 4*|<\        \2//                     |
       ||             2                  |     ||--------------      otherwise     |
       ||/       2/a\\                   |     ||             2                    |
       |||1 + tan |-||                   |     ||/       2/a\\                     |
       ||\        \2//                   |     |||1 + tan |-||                     |
       \\                                /     \\\        \2//                     /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{4 \tan^{2}{\left(\frac{a}{2} \right)}}{\left(\tan^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{\left(- \tan^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}}{\left(\tan^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} & \text{otherwise} \end{cases}\right)\right) - 5$$
                         2                              
       /       2/a   pi\\                               
       |    cos |- - --||                               
       |        \2   2 /|                               
     4*|1 - ------------|                               
       |         2/a\   |                2/a   pi\      
       |      cos |-|   |          16*cos |- - --|      
       \          \2/   /                 \2   2 /      
-5 + --------------------- + ---------------------------
                        2                      2        
      /       2/a   pi\\     /       2/a   pi\\         
      |    cos |- - --||     |    cos |- - --||         
      |        \2   2 /|     |        \2   2 /|     2/a\
      |1 + ------------|     |1 + ------------| *cos |-|
      |         2/a\   |     |         2/a\   |      \2/
      |      cos |-|   |     |      cos |-|   |         
      \          \2/   /     \          \2/   /         
$$\frac{4 \left(1 - \frac{\cos^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}}{\cos^{2}{\left(\frac{a}{2} \right)}}\right)^{2}}{\left(1 + \frac{\cos^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}}{\cos^{2}{\left(\frac{a}{2} \right)}}\right)^{2}} - 5 + \frac{16 \cos^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}}{\left(1 + \frac{\cos^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}}{\cos^{2}{\left(\frac{a}{2} \right)}}\right)^{2} \cos^{2}{\left(\frac{a}{2} \right)}}$$
                         2                                   
       /         2/a\   \                                    
       |      sec |-|   |                                    
       |          \2/   |                                    
     4*|1 - ------------|                                    
       |       2/a   pi\|                     2/a\           
       |    sec |- - --||               16*sec |-|           
       \        \2   2 //                      \2/           
-5 + --------------------- + --------------------------------
                        2                      2             
      /         2/a\   \     /         2/a\   \              
      |      sec |-|   |     |      sec |-|   |              
      |          \2/   |     |          \2/   |     2/a   pi\
      |1 + ------------|     |1 + ------------| *sec |- - --|
      |       2/a   pi\|     |       2/a   pi\|      \2   2 /
      |    sec |- - --||     |    sec |- - --||              
      \        \2   2 //     \        \2   2 //              
$$\frac{4 \left(- \frac{\sec^{2}{\left(\frac{a}{2} \right)}}{\sec^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}} + 1\right)^{2}}{\left(\frac{\sec^{2}{\left(\frac{a}{2} \right)}}{\sec^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}} + 1\right)^{2}} - 5 + \frac{16 \sec^{2}{\left(\frac{a}{2} \right)}}{\left(\frac{\sec^{2}{\left(\frac{a}{2} \right)}}{\sec^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}} + 1\right)^{2} \sec^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}}$$
                         2                              
       /       2/pi   a\\                               
       |    csc |-- - -||                               
       |        \2    2/|                               
     4*|1 - ------------|                               
       |         2/a\   |                2/pi   a\      
       |      csc |-|   |          16*csc |-- - -|      
       \          \2/   /                 \2    2/      
-5 + --------------------- + ---------------------------
                        2                      2        
      /       2/pi   a\\     /       2/pi   a\\         
      |    csc |-- - -||     |    csc |-- - -||         
      |        \2    2/|     |        \2    2/|     2/a\
      |1 + ------------|     |1 + ------------| *csc |-|
      |         2/a\   |     |         2/a\   |      \2/
      |      csc |-|   |     |      csc |-|   |         
      \          \2/   /     \          \2/   /         
$$\frac{4 \left(1 - \frac{\csc^{2}{\left(- \frac{a}{2} + \frac{\pi}{2} \right)}}{\csc^{2}{\left(\frac{a}{2} \right)}}\right)^{2}}{\left(1 + \frac{\csc^{2}{\left(- \frac{a}{2} + \frac{\pi}{2} \right)}}{\csc^{2}{\left(\frac{a}{2} \right)}}\right)^{2}} - 5 + \frac{16 \csc^{2}{\left(- \frac{a}{2} + \frac{\pi}{2} \right)}}{\left(1 + \frac{\csc^{2}{\left(- \frac{a}{2} + \frac{\pi}{2} \right)}}{\csc^{2}{\left(\frac{a}{2} \right)}}\right)^{2} \csc^{2}{\left(\frac{a}{2} \right)}}$$
                                                       //       1         for a mod 2*pi = 0\
                                                       ||                                   |
       //          0             for a mod pi = 0\     ||              2                    |
       ||                                        |     ||/        1   \                     |
       ||          4                             |     |||-1 + -------|                     |
       ||----------------------     otherwise    |     |||        2/a\|                     |
       ||             2                          |     |||     tan |-||                     |
-5 + 4*|
            
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{4}{\left(1 + \frac{1}{\tan^{2}{\left(\frac{a}{2} \right)}}\right)^{2} \tan^{2}{\left(\frac{a}{2} \right)}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{\left(-1 + \frac{1}{\tan^{2}{\left(\frac{a}{2} \right)}}\right)^{2}}{\left(1 + \frac{1}{\tan^{2}{\left(\frac{a}{2} \right)}}\right)^{2}} & \text{otherwise} \end{cases}\right)\right) - 5$$
                                               //                         /    pi\           \
       //      0         for a mod pi = 0\     ||         0           for |a + --| mod pi = 0|
       ||                                |     ||                         \    2 /           |
       ||       2/a\                     |     ||                                            |
       ||  4*cot |-|                     |     ||        2/a   pi\                           |
       ||        \2/                     |     ||   4*cot |- + --|                           |
-5 + 4*|<--------------     otherwise    | + 4*|<         \2   4 /                           |
       ||             2                  |     ||-------------------         otherwise       |
       ||/       2/a\\                   |     ||                  2                         |
       |||1 + cot |-||                   |     ||/       2/a   pi\\                          |
       ||\        \2//                   |     |||1 + cot |- + --||                          |
       \\                                /     ||\        \2   4 //                          |
                                               \\                                            /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{4 \cot^{2}{\left(\frac{a}{2} \right)}}{\left(\cot^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 0 & \text{for}\: \left(a + \frac{\pi}{2}\right) \bmod \pi = 0 \\\frac{4 \cot^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)}}{\left(\cot^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} + 1\right)^{2}} & \text{otherwise} \end{cases}\right)\right) - 5$$
                                                  //                          /    3*pi\             \
       //       1         for a mod 2*pi = 0\     ||         1            for |a + ----| mod 2*pi = 0|
       ||                                   |     ||                          \     2  /             |
       ||              2                    |     ||                                                 |
       ||/        2/a\\                     |     ||                   2                             |
       |||-1 + cot |-||                     |     ||/        2/a   pi\\                              |
-5 + 4*|<\         \2//                     | + 4*|<|-1 + tan |- + --||                              |
       ||---------------      otherwise     |     ||\         \2   4 //                              |
       ||              2                    |     ||--------------------           otherwise         |
       || /       2/a\\                     |     ||                  2                              |
       || |1 + cot |-||                     |     ||/       2/a   pi\\                               |
       \\ \        \2//                     /     |||1 + tan |- + --||                               |
                                                  \\\        \2   4 //                               /
$$\left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{\left(\cot^{2}{\left(\frac{a}{2} \right)} - 1\right)^{2}}{\left(\cot^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: \left(a + \frac{3 \pi}{2}\right) \bmod 2 \pi = 0 \\\frac{\left(\tan^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} - 1\right)^{2}}{\left(\tan^{2}{\left(\frac{a}{2} + \frac{\pi}{4} \right)} + 1\right)^{2}} & \text{otherwise} \end{cases}\right)\right) - 5$$
       //           0              for a mod pi = 0\                                                  
       ||                                          |     //          1             for a mod 2*pi = 0\
       ||           2                              |     ||                                          |
       ||        sin (a)                           |     ||                     2                    |
       ||------------------------     otherwise    |     ||/   2           4/a\\                     |
       ||               2                          |     |||sin (a) - 4*sin |-||                     |
-5 + 4*|
            
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{\sin^{2}{\left(a \right)}}{\left(1 + \frac{\sin^{2}{\left(a \right)}}{4 \sin^{4}{\left(\frac{a}{2} \right)}}\right)^{2} \sin^{4}{\left(\frac{a}{2} \right)}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{\left(- 4 \sin^{4}{\left(\frac{a}{2} \right)} + \sin^{2}{\left(a \right)}\right)^{2}}{\left(4 \sin^{4}{\left(\frac{a}{2} \right)} + \sin^{2}{\left(a \right)}\right)^{2}} & \text{otherwise} \end{cases}\right)\right) - 5$$
                                                         //        1          for a mod 2*pi = 0\
                                                         ||                                     |
       //           0              for a mod pi = 0\     ||                2                    |
       ||                                          |     ||/         2    \                     |
       ||           2                              |     |||      sin (a) |                     |
       ||        sin (a)                           |     |||-1 + ---------|                     |
       ||------------------------     otherwise    |     |||          4/a\|                     |
       ||               2                          |     |||     4*sin |-||                     |
-5 + 4*|
            
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{\sin^{2}{\left(a \right)}}{\left(1 + \frac{\sin^{2}{\left(a \right)}}{4 \sin^{4}{\left(\frac{a}{2} \right)}}\right)^{2} \sin^{4}{\left(\frac{a}{2} \right)}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{\left(-1 + \frac{\sin^{2}{\left(a \right)}}{4 \sin^{4}{\left(\frac{a}{2} \right)}}\right)^{2}}{\left(1 + \frac{\sin^{2}{\left(a \right)}}{4 \sin^{4}{\left(\frac{a}{2} \right)}}\right)^{2}} & \text{otherwise} \end{cases}\right)\right) - 5$$
       //                0                  for a mod pi = 0\     //                 1                    for a mod 2*pi = 0\
       ||                                                   |     ||                                                        |
       ||/      0         for a mod pi = 0                  |     ||/       1         for a mod 2*pi = 0                    |
       |||                                                  |     |||                                                       |
       |||       2/a\                                       |     |||              2                                        |
       |||  4*cot |-|                                       |     |||/        2/a\\                                         |
-5 + 4*|<|        \2/                                       | + 4*|<||-1 + cot |-||                                         |
       ||<--------------     otherwise         otherwise    |     ||<\         \2//                           otherwise     |
       |||             2                                    |     |||---------------      otherwise                         |
       |||/       2/a\\                                     |     |||              2                                        |
       ||||1 + cot |-||                                     |     ||| /       2/a\\                                         |
       |||\        \2//                                     |     ||| |1 + cot |-||                                         |
       \\\                                                  /     \\\ \        \2//                                         /
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{4 \cot^{2}{\left(\frac{a}{2} \right)}}{\left(\cot^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} & \text{otherwise} \end{cases} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{\left(\cot^{2}{\left(\frac{a}{2} \right)} - 1\right)^{2}}{\left(\cot^{2}{\left(\frac{a}{2} \right)} + 1\right)^{2}} & \text{otherwise} \end{cases} & \text{otherwise} \end{cases}\right)\right) - 5$$
                                                                 //         1            for a mod 2*pi = 0\
                                                                 ||                                        |
       //               0                  for a mod pi = 0\     ||                   2                    |
       ||                                                  |     ||/          2/a\   \                     |
       ||                2/a\                              |     |||       cos |-|   |                     |
       ||           4*cos |-|                              |     |||           \2/   |                     |
       ||                 \2/                              |     |||-1 + ------------|                     |
       ||--------------------------------     otherwise    |     |||        2/a   pi\|                     |
       ||                  2                               |     |||     cos |- - --||                     |
-5 + 4*|
            
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{4 \cos^{2}{\left(\frac{a}{2} \right)}}{\left(\frac{\cos^{2}{\left(\frac{a}{2} \right)}}{\cos^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}} + 1\right)^{2} \cos^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{\left(\frac{\cos^{2}{\left(\frac{a}{2} \right)}}{\cos^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}} - 1\right)^{2}}{\left(\frac{\cos^{2}{\left(\frac{a}{2} \right)}}{\cos^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}} + 1\right)^{2}} & \text{otherwise} \end{cases}\right)\right) - 5$$
                                                            //         1            for a mod 2*pi = 0\
                                                            ||                                        |
       //             0               for a mod pi = 0\     ||                   2                    |
       ||                                             |     ||/        2/a   pi\\                     |
       ||            2/a   pi\                        |     |||     sec |- - --||                     |
       ||       4*sec |- - --|                        |     |||         \2   2 /|                     |
       ||             \2   2 /                        |     |||-1 + ------------|                     |
       ||---------------------------     otherwise    |     |||          2/a\   |                     |
       ||                  2                          |     |||       sec |-|   |                     |
-5 + 4*|
            
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{4 \sec^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}}{\left(1 + \frac{\sec^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}}{\sec^{2}{\left(\frac{a}{2} \right)}}\right)^{2} \sec^{2}{\left(\frac{a}{2} \right)}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{\left(-1 + \frac{\sec^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}}{\sec^{2}{\left(\frac{a}{2} \right)}}\right)^{2}}{\left(1 + \frac{\sec^{2}{\left(\frac{a}{2} - \frac{\pi}{2} \right)}}{\sec^{2}{\left(\frac{a}{2} \right)}}\right)^{2}} & \text{otherwise} \end{cases}\right)\right) - 5$$
                                                                 //         1            for a mod 2*pi = 0\
                                                                 ||                                        |
       //               0                  for a mod pi = 0\     ||                   2                    |
       ||                                                  |     ||/          2/a\   \                     |
       ||                2/a\                              |     |||       csc |-|   |                     |
       ||           4*csc |-|                              |     |||           \2/   |                     |
       ||                 \2/                              |     |||-1 + ------------|                     |
       ||--------------------------------     otherwise    |     |||        2/pi   a\|                     |
       ||                  2                               |     |||     csc |-- - -||                     |
-5 + 4*|
            
$$\left(4 \left(\begin{cases} 0 & \text{for}\: a \bmod \pi = 0 \\\frac{4 \csc^{2}{\left(\frac{a}{2} \right)}}{\left(\frac{\csc^{2}{\left(\frac{a}{2} \right)}}{\csc^{2}{\left(- \frac{a}{2} + \frac{\pi}{2} \right)}} + 1\right)^{2} \csc^{2}{\left(- \frac{a}{2} + \frac{\pi}{2} \right)}} & \text{otherwise} \end{cases}\right)\right) + \left(4 \left(\begin{cases} 1 & \text{for}\: a \bmod 2 \pi = 0 \\\frac{\left(\frac{\csc^{2}{\left(\frac{a}{2} \right)}}{\csc^{2}{\left(- \frac{a}{2} + \frac{\pi}{2} \right)}} - 1\right)^{2}}{\left(\frac{\csc^{2}{\left(\frac{a}{2} \right)}}{\csc^{2}{\left(- \frac{a}{2} + \frac{\pi}{2} \right)}} + 1\right)^{2}} & \text{otherwise} \end{cases}\right)\right) - 5$$
-5 + 4*Piecewise((0, Mod(a = pi, 0)), (4*csc(a/2)^2/((1 + csc(a/2)^2/csc(pi/2 - a/2)^2)^2*csc(pi/2 - a/2)^2), True)) + 4*Piecewise((1, Mod(a = 2*pi, 0)), ((-1 + csc(a/2)^2/csc(pi/2 - a/2)^2)^2/(1 + csc(a/2)^2/csc(pi/2 - a/2)^2)^2, True))
Численный ответ [src]
-5.0 + 4.0*cos(a)^2 + 4.0*sin(a)^2
-5.0 + 4.0*cos(a)^2 + 4.0*sin(a)^2