Question 224213
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This is most assuredly NOT a limaçon whose general polar equation is *[tex \Large r\ =\ b\ +\ 2a\ \cos{\theta}].  This is more closely related to Bernoulli's Lemniscate, *[tex \Large r^2\ =\ a^2\cos{2\theta}] 



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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