Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §9.1 Polar Coordinates, #26 · Calculus · Parametric & polar

From the parametric equations … and … in (4), recover the …

This problem is about polar equations that give circles.

From the parametric equations $x = cos^{2} θ$ and $y = sin θ cos θ$ in (4), recover the $x y$ equation. Square, add, eliminate $θ$ .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §9.1 Polar Coordinates, #26

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