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!

Homework Help: Evaluate double integral by changing to polar coordinates

  1. Dec 1, 2009 #1

    what'd I do wrong?
    I was told I didn't include the bound y<=x but that still hasn't helped me figure out where I miss stepped

    Last edited: Dec 1, 2009
  2. jcsd
  3. Dec 1, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    Ok, why did you ignore the advice that you didn't include the bound y<=x? You didn't, so you angular limits are wrong. For another thing, arctan(tan(t)) is not necessarily t. tan(5*pi/4)=1. arctan(1)=pi/4. You'll have to split along quadrants as well.
  4. Dec 2, 2009 #3
    I didn't ignore the advice, it just wasn't enough for me to go on to find and correct my error.
    I understand now. Thank you for your help.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook