Question

How do you find the derivative of `cos^4(x^7)`?

Answer 1

`-28x^6cos^3(x^7)sin(x^7)`

Explanation:

By using the power rule in conjunction with other rules of differentiation, we get

`d/dx cos^4(x^7)=4cos^3(x^7)*(-sin(x^7))*(7x^6)`