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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


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    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.
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