The derivative of a constant times a function is the constant times the derivative of the function.
Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
The derivative of sine is cosine:
The result of the chain rule is:
So, the result is:
The answer is:
2 3*sin (x)*cos(x) ---------------- 2
/ 2 2 \ -3*\sin (x) - 2*cos (x)/*sin(x) ------------------------------- 2
/ 2 2 \ -3*\- 2*cos (x) + 7*sin (x)/*cos(x) ----------------------------------- 2