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Homework Help: Polar Coordinates

  1. Nov 1, 2009 #1
    1. The problem statement, all variables and given/known data

    Give the equations for the plane polar unit vectors

    ^ ^
    r and (theta)
    - -

    in terms of

    the Cartesian unit vectors
    ^ and ^ and hence show that
    i j
    - -

    ^ . ^
    dr / dt = (theta) x theta
    - -

    2. Relevant equations

    3. The attempt at a solution

    I don't know how I can approach this question as I missed my lesson. I tried to google Polar Coordinates but the materials that I found weren't closely related to this. What topic should I look up? Any recommended websites? Thanks!
  2. jcsd
  3. Nov 1, 2009 #2


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