Let . Determine all values of in the interval at which the curve has a horizontal…

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

Problem

Let r=2+2sin⁡θr=2+2\sin\theta. Determine all values of θ\theta in the interval 0≤θ<2π0\le\theta<2\pi at which the curve has a horizontal tangent line.

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