# Math Help - Can someone explain how to do this

1. ## 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.

2. Recall that $\cos^2(\theta)+\sin^2(\theta)=1$.
Then write $9x=45\cos(\theta)~\&~5y=45\sin(\theta)$