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Homework Help: Polar coordinates

  1. Aug 15, 2010 #1
    1. The problem statement, all variables and given/known data
    the circle travels clockwise from (0,-1) to (0,1)
    write down the parameterization in term of t


    2. Relevant equations



    3. The attempt at a solution
    x=cost(t)
    y=-sin(t)

    i'm not sure about the sign of the polar coordinate, how to find the sign?
     
    Last edited: Aug 15, 2010
  2. jcsd
  3. Aug 15, 2010 #2
    Think about the extremes, what should the values be at t = 0? what about t = pi?
     
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