Apply the product rule:
; to find :
Apply the power rule: goes to
; to find :
Let .
The derivative of sine is cosine:
Then, apply the chain rule. Multiply by :
Apply the power rule: goes to
The result of the chain rule is:
The result is:
The answer is:
/1\ /1\ - cos|-| + 2*x*sin|-| \x/ \x/
/1\ sin|-| /1\ \x/ /1\ 2*cos|-| - ------ 4*cos|-| /1\ \x/ x \x/ 2*sin|-| + ----------------- - -------- \x/ x x
/1\ cos|-| \x/ ------ 4 x