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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- Sep 14th 2009, 09:52 AMxpackCan 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. - Sep 14th 2009, 10:24 AMPlato
Recall that $\displaystyle \cos^2(\theta)+\sin^2(\theta)=1$.

Then write $\displaystyle 9x=45\cos(\theta)~\&~5y=45\sin(\theta)$

Square and add. Finish?