1. Limited time only! Sign up for a free 30min personal 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!

Changing to polar integration

  1. Nov 4, 2013 #1
    1. The problem statement, all variables and given/known data
    Evaluate the integral by changing to polar coordinates.

    Double Integral: (x^2+y^2)dydx, where dy is bound between 0 and (4-x^2)^(1/2) and dx is between and -2 and 2

    3. The attempt at a solution
    okay so I can turn this into
    Double Integral: (r^2)rdrdθ

    My question is on the parameters of dr and dθ
    I really want to say dr goes from 0 to 2.
    does dθ go from 0 to 2∏
  2. jcsd
  3. Nov 4, 2013 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper

    If that is what you really want to say, then what is stopping you?

    it is not dr that goes from 0 to 2, it is r that does that. etc.
  4. Nov 4, 2013 #3


    Staff: Mentor

    Can you describe, in words, the region over integration takes place? If you understand this region, you'll pretty much have answered your question about θ.
  5. Nov 4, 2013 #4


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    I second Mark's comment. Tell us what the region looks like. For all we know, your original integral may be set up wrong.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted