Beta Function Demonstration Problem. I pushed the "Enter" key by accident and the topics name got ruined. Good Day to everyone, I have this problem, (In the context of the Gamma and Beta functions) I have to demonstrate that: 1. The problem statement, all variables and given/known data Demonstrate that http://img576.imageshack.us/i/integralsola.jpg/ [Broken] Uploaded with ImageShack.us 2. Relevant equations Can I state that x=y so that tan^v(theta) can be expressed as the Trigonometric representation Beta Function? 3. The attempt at a solution http://img202.imageshack.us/img202/1423/intento.jpg [Broken] Uploaded with ImageShack.us So once i make the substitution, i try to solve the integral, if've use both variable change and integration by parts, but always get everything messy and far away from the desired result, if someone could please give a direction, is there some essential substition that I'm not making?, or some property of the function I'm not applying? Any little direction you give i would gladly apreciatte Note: I drew these equations on M.Word Thank you all.