Apply the product rule:
; to find :
Apply the power rule: goes to
; to find :
Rewrite the function to be differentiated:
Apply the quotient rule, which is:
and .
To find :
Let .
The derivative of sine is cosine:
Then, apply the chain rule. Multiply by :
Differentiate term by term:
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: goes to
So, the result is:
The derivative of the constant is zero.
The result is:
The result of the chain rule is:
To find :
Let .
The derivative of cosine is negative sine:
Then, apply the chain rule. Multiply by :
Differentiate term by term:
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: goes to
So, the result is:
The derivative of the constant is zero.
The result is:
The result of the chain rule is:
Now plug in to the quotient rule:
The result is:
Now simplify:
The answer is:
2 / 2 \ x *\4 + 4*tan (4*x + 1)/ + 2*x*tan(4*x + 1)
/ / 2 \ 2 / 2 \ \ 2*\8*x*\1 + tan (1 + 4*x)/ + 16*x *\1 + tan (1 + 4*x)/*tan(1 + 4*x) + tan(1 + 4*x)/
/ 2 2 / 2 \ / 2 \ / 2 \ \ 8*\3 + 3*tan (1 + 4*x) + 16*x *\1 + tan (1 + 4*x)/*\1 + 3*tan (1 + 4*x)/ + 24*x*\1 + tan (1 + 4*x)/*tan(1 + 4*x)/