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Homework Help: Chain Rule problem

  1. Jun 18, 2008 #1
    use chain rule to evaluate partial derivative of g with respect to theta at (r,[theta])=(2*sqrt(2),pi/4), where g(x,y) = 1/(x+y^2), x=rsin[theta] and y=rcos[theta]


    r^2=x^2+y^2 and tan[theta]=y/x

    3. The attempt at a solution

    I understand how to use the chain rule for partial derivatives, but I can't seem to figure out any of the problems that use polar coordinates. please help.
     
  2. jcsd
  3. Jun 18, 2008 #2
    use
    x=rcos(theta)
    y=rsin(theta)
     
  4. Jun 18, 2008 #3
    - so for every x/y in the equation I get, plug in the polar coordinate for them?
     
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