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Homework Help: Polar equation problem

  1. May 21, 2010 #1
    1. The problem statement, all variables and given/known data
    let r = sin(t)+ cos(t)
    sketch the graph

    2. Relevant equations

    3. The attempt at a solution

    i really don't know how to start this off.
    i know some working should be done in order to sketch it but what?
  2. jcsd
  3. May 21, 2010 #2
    If you were sketching a graph in the Cartesian plane (x,y), how would you do it? You'd pick some x points, calculate the y value, and plot the points, and then infer the shape of the curve from that.

    It's no different here. Let t take on a number of values in its domain, and calculate r. Then plot those points in polar coordinates.
  4. May 21, 2010 #3
    really? ohkay~
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