Mathematics

Mathematics

Problem

The gradient of the tangent line at the point (acos⁡α,asin⁡α)(a \cos \alpha, a \sin \alpha) to the circle x2+y2=a2x^2 + y^2 = a^2, is - (A) tan⁡(π−α)\tan(\pi - \alpha) (B) tan⁡α\tan \alpha (C) cot⁡α\cot \alpha (D) −cot⁡α-\cot \alpha

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