- #1

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I get the feeling I'm missing some kind of 'trick', as this is proving a very difficult question :(

I'll write out my frustration below;

## Homework Statement

Find f'(x) if f(x) = [itex]\int^{cosh(x^{2})}_{0} tanh(t^2)dt[/itex]

## Homework Equations

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## The Attempt at a Solution

My idea was to find the value of the integral (using integration by parts), simplify it and then differentiate it.

However, this method seems rather time consuming (and difficult).

Am I missing something?