cot(x) cos (3*x)
d / cot(x) \ --\cos (3*x)/ dx
Не могу найти шаги в поиске этой производной.
Но производная
Ответ:
cot(x) // 2 \ 3*cot(x)*sin(3*x)\
cos (3*x)*|\-1 - cot (x)/*log(cos(3*x)) - -----------------|
\ cos(3*x) /
/ 2 2 / 2 \ \
cot(x) |// 2 \ 3*cot(x)*sin(3*x)\ 9*sin (3*x)*cot(x) / 2 \ 6*\1 + cot (x)/*sin(3*x)|
cos (3*x)*||\1 + cot (x)/*log(cos(3*x)) + -----------------| - 9*cot(x) - ------------------ + 2*\1 + cot (x)/*cot(x)*log(cos(3*x)) + ------------------------|
|\ cos(3*x) / 2 cos(3*x) |
\ cos (3*x) /
/ 3 2 / 2 / 2 \ \ 2 / 2 \ 3 / 2 \ \
cot(x) | // 2 \ 3*cot(x)*sin(3*x)\ 2 / 2 \ // 2 \ 3*cot(x)*sin(3*x)\ | 9*sin (3*x)*cot(x) / 2 \ 6*\1 + cot (x)/*sin(3*x)| 27*sin (3*x)*\1 + cot (x)/ 2 / 2 \ 54*cot(x)*sin(3*x) 54*sin (3*x)*cot(x) 18*\1 + cot (x)/*cot(x)*sin(3*x)|
-cos (3*x)*|-27 + |\1 + cot (x)/*log(cos(3*x)) + -----------------| - 27*cot (x) + 2*\1 + cot (x)/ *log(cos(3*x)) + 3*|\1 + cot (x)/*log(cos(3*x)) + -----------------|*|-9*cot(x) - ------------------ + 2*\1 + cot (x)/*cot(x)*log(cos(3*x)) + ------------------------| - -------------------------- + 4*cot (x)*\1 + cot (x)/*log(cos(3*x)) + ------------------ + ------------------- + --------------------------------|
| \ cos(3*x) / \ cos(3*x) / | 2 cos(3*x) | 2 cos(3*x) 3 cos(3*x) |
\ \ cos (3*x) / cos (3*x) cos (3*x) /