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Mathematica help

  1. Jan 30, 2013 #1
    I am stuck on the following task;

    Create a 2D Parametric Plot showing a spiral path. The parametric equations for a logarithmic spiral are x=k^u Cosine(u), y=k^u Sine(u), where k is a constant, and u is the plot parameter. What does the value of k determine?

    I have been typing in the following but it is wrong

    ParametricPlot[{(k^u)*(Cos) /. {k -> 1}}, {(k^u)*(Sin) /. {k ->
    1}}, {u, 0, 6 Pi}]
    Can anyone help?

    much appreciated
  2. jcsd
  3. Jan 31, 2013 #2
    No worries peeps, I figured it out, just had some dodgy brackets about!
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