Posted by
**Arisa** on
.

Use the derivatives of sinx and cosx to show that d/dx [tanx] = sec^2 and that d/dx [secx]=sec^2xsinx.

Hence evaluate ∫ [1 + sinx]/[cos^2x] dx limit from 0 to pi

I know the first part of the question, i'm not sure how i should do the second part "hence ..."