1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Inverse trig substitution integral

  1. Feb 28, 2010 #1
    Hi,

    I need to integrate the following:

    [tex]\int \frac{x^2}{\sqrt{9-x^2}}[/tex]

    So let [tex]x = 3sin\theta[/tex]
    [tex]\frac{dx}{d\theta} = 3cos\theta[/tex]

    So i now have the integral of [tex]\frac{9sin^2\theta \cdot 3cos\theta}{3cos\theta}[/tex]

    How do i go about the integration from here? parts?
     
  2. jcsd
  3. Feb 28, 2010 #2

    vela

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    Try simplifying the integrand first.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Inverse trig substitution integral
Loading...