Differentiate term by term:
Don't know the steps in finding this derivative.
But the derivative is
The derivative of cosine is negative sine:
The result is:
The answer is:
2 sin(x) /sin(x) \ sin(x) /sin(x) 2*cos(x)\ -cos(x) + x *|------ + cos(x)*log(x)| - x *|------ + log(x)*sin(x) - --------| \ x / | 2 x | \ x /
3 sin(x) /sin(x) \ sin(x) / 2*sin(x) 3*sin(x) 3*cos(x)\ sin(x) /sin(x) \ /sin(x) 2*cos(x)\ x *|------ + cos(x)*log(x)| - x *|cos(x)*log(x) - -------- + -------- + --------| - 3*x *|------ + cos(x)*log(x)|*|------ + log(x)*sin(x) - --------| + sin(x) \ x / | 3 x 2 | \ x / | 2 x | \ x x / \ x /