(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Parametrize the following equation using polar coordinates:

2. Relevant equations

$(x^2+y^2)^2 = r^2 (x^2 - y^2)$

3. The attempt at a solution

It seems that $x=r\cos{\theta}$ and $y = r\sin{\theta}$ don't work. any suggestions?

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# Parametrize this curve

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