Apply the product rule:
; to find :
Let .
The derivative of is itself.
Then, apply the chain rule. Multiply by :
The derivative of sine is cosine:
The result of the chain rule is:
; to find :
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 is:
Now simplify:
The answer is:
/ / 2 \ / 2 \ / 2 \ \ sin(x) \- \- cos (x) + sin(x)/*tan(x) + 2*\1 + tan (x)/*cos(x) + 2*\1 + tan (x)/*tan(x)/*e