# Math Help - Integral involving trig substitution

1. ## Integral involving trig substitution

Here is the question:

I have been trying so long and I still cannot seem to get it.

Any help is appreciated.

2. Originally Posted by Shapeshift
Here is the question:

I have been trying so long and I still cannot seem to get it.

Any help is appreciated.
See here: - Wolfram|Alpha

Be sure to click on Show steps.

3. If you recall the identity $tan^2\theta + sec^2\theta = 1$ More so

In this case let $x = 5 tan\theta$ and $dx = 5sec^2\theta$

can you take it from here? Also with definite integrals remember to change your limits of integration properly