# Math Help - find second derivative

1. ## find second derivative

Find the second derivative of the function:
F(x) = integral from 0 to x [e^tan(t)]dt

This one is really messin with my head does anyone have an idea how to do this one?
Thank you

2. Originally Posted by cowboys111
Find the second derivative of the function:
F(x) = integral from 0 to x [e^tan(t)]dt
Do you know what The Fundamental Theorem of Calculus is?

$f(x)=\int_0^x e^{\tan t}\,dt\implies f'(x)=e^{\tan x}.$

I think you can take it from there.

3. ok thank you i wasnt sure about that one