Question

what is the derivative of y=cos^5[pi(t)-19]

Answer 1

\[y=[\cos(\pi t -19)]^5\]

Answer 2

you have a lot of chain rule that needs to happen

Answer 3

\[y'=5 [\cos(\pi t -19)]^{5-1}[\cos(\pi t -19)]' \text{ by chain rule and power rule }\]

Answer 4

see if you can continue from here