3 sin (x) + sin(3*x)
d / 3 \ --\sin (x) + sin(3*x)/ dx
Differentiate term by term:
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:
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 is:
Now simplify:
The answer is:
2 3*cos(3*x) + 3*sin (x)*cos(x)
/ 3 2 \ 3*\- sin (x) - 3*sin(3*x) + 2*cos (x)*sin(x)/
/ 3 2 \ 3*\-9*cos(3*x) + 2*cos (x) - 7*sin (x)*cos(x)/