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Homework Help: Identify type of conic and more

  1. Dec 2, 2012 #1
    Identify type of conic and more....

    1. The problem statement, all variables and given/known data
    Identify the type of conic, find the vertices, the foci, directrix, and asymptotes (if they exist) for the equation e=45/(10+9sin(θ))

    2. Relevant equations
    As far as equations I don't know of any to help me find which type of conic, or any characteristics of this.

    3. The attempt at a solution
    Graphing in polar mode, I find that it is an ellipse.
    I think we have to convert it from a polar equation into Cartesian coordinates.
  2. jcsd
  3. Dec 2, 2012 #2


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    Re: Identify type of conic and more....

    I assume e is what's normally written as r in polar.
    Multiply out the equation. Then try rearranging it so that when you square both sides every occurrence of r is either as r2 or as r sinθ.
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