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## Homework Statement

I'm given the problem: [tex]\int[/tex][tex]\frac{\sqrt{y^{2}-25}}{y}[/tex] dy

## Homework Equations

I set y = 5sec(u), and solve for the subsitution.

## The Attempt at a Solution

At the culmination of my solution, I achieve: 5tan(u) - 5u + C

Here is my dilemma,

**u**stands for arcsec([tex]\frac{y}{5}[/tex]) -- How do I deal with tan(arcsec(..)), or any "trig within trig" setup? I've gone all this time without actually ever figuring out how to solve for these.