The derivative of a constant times a function is the constant times the derivative of the function.
Let .
The derivative of is .
Then, apply the chain rule. Multiply by :
The derivative of sine is cosine:
The result of the chain rule is:
So, the result is:
Now simplify:
The answer is:
/ 2 \ | cos (x)| 2*|1 + -------|*cos(x) | 2 | \ sin (x)/ ---------------------- log(2)*sin(x)