Lemma
EasyParametric & polar
OpenStax, Algebra and Trigonometry 2e §10.3 Polar Coordinates · Try It 4 · Calculus · Parametric & polar

Polar Coordinates · Try It 4

Rewrite the Cartesian equation in polar form.

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OpenStax, Algebra and Trigonometry 2e · §10.3 Polar Coordinates · Try It 4

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Checked against the answer in OpenStax, Algebra and Trigonometry 2e.