acos(3 - x)
d --(acos(3 - x)) dx
1 ----------------- ______________ / 2 \/ 1 - (3 - x)
-3 + x
-----------------
3/2
/ 2\
\1 - (3 - x) /
2
3*(-3 + x)
1 + ------------
2
1 - (3 - x)
-----------------
3/2
/ 2\
\1 - (3 - x) /