I have one small doubt in one of the question and would appreciate your advise.

I have this question to find the volume of cone \phi =\pi /4 by the sphere \rho =2 a cos\phi .

I think that:

1. I need to use triple integrals

2. \phi goes from 0 to \pi /4, \rho goes from 0 to 2 a cos\phi and \theta goes from 0 to 2\pi .

Am I on the right track?