2 ________ \/ tan(x)
/ 2\ d | ________ | --\\/ tan(x) / dx
Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Rewrite the function to be differentiated:
Apply the quotient rule, which is:
and .
To find :
The derivative of sine is cosine:
To find :
The derivative of cosine is negative sine:
Now plug in to the quotient rule:
The result of the chain rule is:
The result of the chain rule is:
Now simplify:
The answer is:
/ 2 \ |1 tan (x)| 2*|- + -------|*tan(x) \2 2 / ---------------------- tan(x)
/ 2 \ 2*\1 + tan (x)/*tan(x)
/ 2 \ / 2 \ 2*\1 + tan (x)/*\1 + 3*tan (x)/