3 5 sin (2*x)*cos (8*x)
d / 3 5 \ --\sin (2*x)*cos (8*x)/ dx
Apply the product rule:
; to find :
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:
; to find :
Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Let .
The derivative of cosine is negative sine:
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 result is:
Now simplify:
The answer is:
4 3 5 2 - 40*cos (8*x)*sin (2*x)*sin(8*x) + 6*cos (8*x)*sin (2*x)*cos(2*x)
3 / 2 / 2 2 \ 2 / 2 2 \ \ 4*cos (8*x)*\- 3*cos (8*x)*\sin (2*x) - 2*cos (2*x)/ + 80*sin (2*x)*\- cos (8*x) + 4*sin (8*x)/ - 120*cos(2*x)*cos(8*x)*sin(2*x)*sin(8*x)/*sin(2*x)
2 / 3 / 2 2 \ 3 / 2 2 \ 2 / 2 2 \ 2 / 2 2 \ \ 8*cos (8*x)*\- 320*sin (2*x)*\- 13*cos (8*x) + 12*sin (8*x)/*sin(8*x) - 3*cos (8*x)*\- 2*cos (2*x) + 7*sin (2*x)/*cos(2*x) + 180*cos (8*x)*\sin (2*x) - 2*cos (2*x)/*sin(2*x)*sin(8*x) + 720*sin (2*x)*\- cos (8*x) + 4*sin (8*x)/*cos(2*x)*cos(8*x)/