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Homework Help: Polar Equations

  1. May 16, 2013 #1
    1. The problem statement, all variables and given/known data

    Find a polar equation with the graph as xy=16


    2. Relevant equations

    r = ed/(1+- cos[itex]\theta[/itex])? I'm not really sure at all.

    3. The attempt at a solution

    I also tried using x = rcos[itex]\theta[/itex] and y = r sin[itex]\theta[/itex] but I can't get anything. I know it's a hyperbola.
     
  2. jcsd
  3. May 16, 2013 #2

    ehild

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    Homework Helper

    It is all right. How are r and θ related then?

    ehild
     
  4. May 16, 2013 #3
    Inversely? I'm not sure!
     
  5. May 16, 2013 #4

    ehild

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    Homework Helper

    No, why do you think so?

    Just plug in x=rcosθ and y=rsinθ into the original equation xy=16.

    ehild
     
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