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: Line integral

  1. Aug 14, 2008 #1
    1. The problem statement, all variables and given/known data

    I need to use Green's theorem in order to solve this integral.
    My question is, how can I find the area for the Green's theorem integral?

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Aug 14, 2008 #2


    User Avatar
    Science Advisor

    If x= sin t cos t and y= sin2 t, then x2+ y2= sin2tcos2t+ sin4t= sin2 t(cos2 t+ sin2t)= sin2(t)= y so the equation, in Cartesian coordinates, is x2+ y2- y= 0. Complete the square and you can see that is a circle.
    Last edited by a moderator: Aug 15, 2008
  4. Aug 15, 2008 #3
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook