# Integral involving a square root which I can't work out!

1. Apr 30, 2009

### sandysip

1. The problem statement, all variables and given/known data

Hi, I'm stuck on the following integral.

∫ y / (√(a(y^2)-c)) dy

where a and c are constants

2. Relevant equations

3. The attempt at a solution

I've tried using standard integrals involving square roots in the denominator, but I'm unsure what to do with the y on the numerator.

Any help would be appreciated!

2. Apr 30, 2009

### dx

Hint: Write the integrand as the derivative of a function of the form √(______).