To do this, we use the conversion formulas $x=r\cos\theta$ and $y=r\sin\theta$. Substituting these into the given equation, we get:
$$r^2\cos^2\theta + r^2\sin^2\theta = 3r\cos\theta$$
Simplifying this equation, we get:
$$r = 3\cos\theta$$
This is the polar
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