If , , then find…

MATHEMATICS · Subjective · AP · Calculus BC · Parametric, Polar, and Vector-Valued Functions · Parametric, Polar, and Vector-Valued Functions

Problem

If x=acos⁡3θx = a \cos^3 \theta , y=asin⁡3θy = a \sin^3 \theta , then find d2ydx2\frac{d^2 y}{dx^2} .

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