Don't know the steps in finding this derivative.
But the derivative is
The answer is:
3 / 3 \ sin (x) |sin (x) 2 | x *|------- + 3*sin (x)*cos(x)*log(x)| \ x /
3 / 2 2 \ sin (x) |/sin(x) \ 3 sin (x) 2 2 6*cos(x)*sin(x)| x *||------ + 3*cos(x)*log(x)| *sin (x) - ------- - 3*sin (x)*log(x) + 6*cos (x)*log(x) + ---------------|*sin(x) |\ x / 2 x | \ x /
3 / 3 3 3 2 / 2 \ 2 \ sin (x) |/sin(x) \ 6 9*sin (x) 2*sin (x) 3 2 9*sin (x)*cos(x) 3 /sin(x) \ |sin (x) 2 2 6*cos(x)*sin(x)| 18*cos (x)*sin(x)| x *||------ + 3*cos(x)*log(x)| *sin (x) - --------- + --------- + 6*cos (x)*log(x) - 21*sin (x)*cos(x)*log(x) - ---------------- - 3*sin (x)*|------ + 3*cos(x)*log(x)|*|------- - 6*cos (x)*log(x) + 3*sin (x)*log(x) - ---------------| + -----------------| |\ x / x 3 2 \ x / | 2 x | x | \ x x \ x / /