Question

What is the derivative of `ln( secx+tanx)`?

Answer 1

`f'(x)=secx`

Explanation:

`f'(x)=1/(secx+tanx) * (secxtanx+sec^2x)`

`f'(x)=1/(secx+tanx) *secx (tanx+secx)`

`f'(x)=secx`