Question

What is the derivative of `tan(3x+1)`?

Answer 1

`y'=3(1+tan^2(3x+1))`

Explanation:

`y=tan(3x+1)`

`"let 3x+1=u :"`

`y=tan u`

`y^'=u^'*(1+tan^2u)`

`u^'=3`

`y'=3(1+tan^2(3x+1))`