Question #f5e26

1 Answer
Oct 14, 2017

y''=2tanxsec^2x

Explanation:

let y=x+tanx.

Using the fact that the derivative of tanx is sec^2x:

y=1+sec^2x

Using the chain rule to differentiate sec^2x, and the fact that the derivative of secx is secxtanx:

y''=2secx xx tanxsecx

therefore y''=2tanxsec^2x