Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Let .
The derivative of sine is cosine:
Then, apply the chain rule. Multiply by :
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 result of the chain rule is:
The result of the chain rule is:
The answer is:
3 12*sin (3*x)*cos(3*x)
2 / 2 2 \ 36*sin (3*x)*\- sin (3*x) + 3*cos (3*x)/