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!

Double integral help

  1. Jun 3, 2007 #1
    doubleIntegral( |cos(x+y)| dx dy ) over the rectangle [0, pi]x[0,pi]

    I tried several ways to split the integral up so that I could remove the absolute value sign and integrate. However, I did not get the correct answer, so I must be splitting it wrong. Can someone show me how to split the region of integration up so I can integrate iteratively?
     
  2. jcsd
  3. Jun 3, 2007 #2
    At a glance, not saying this will work, but try using polar coordinates? ie x^2+Y^2=r^2 and so on.
     
  4. Jun 4, 2007 #3

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    Polar coordinates are a bad idea. Cut the square along the lines x+y=pi/2 and x+y=(3*pi/2) - since this is where the cos changes sign.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Double integral help
  1. Double integral help (Replies: 5)

  2. Double integral help? (Replies: 2)

  3. Double Integral Help (Replies: 2)

  4. Double integrals help (Replies: 6)

Loading...