# Math Help - Trigonometric substitution for integrals

1. ## Trigonometric substitution for integrals

i need help with the question:

Evaluate the following integral using a trigonometric substitution.

int[dx/(x^2-1)^(3/2)], x>1

any help would be appreciated, thanks.

2. Trigonometric Substitution

Does your integrand contain any of the forms given in the wiki entry? Yes. $x^2 - a^2$.

What trig substitution should you use? $x = \cdots$

3. oh ok so the substution is x=secx