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: 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?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook