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Math Help - Can someone explain how to do this

  1. #1
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    Can someone explain how to do this

    Can someone explain how to do this:

    Consider the following parametric equations.
    x = 5cos(θ)
    y = 9sin(θ)
    0 ≤ θ ≤ 2π
    (a) Eliminate the parameter to find the Cartesian equation of the curve.
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  2. #2
    MHF Contributor

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    Recall that \cos^2(\theta)+\sin^2(\theta)=1.
    Then write 9x=45\cos(\theta)~\&~5y=45\sin(\theta)
    Square and add. Finish?
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