CBSE

MATHEMATICS · Single correct · CBSE · Mathematics · Continuity and Differentiability · Continuity and Differentiability

Problem

If y=cot⁡−1(1+x1−x)y=\cot^{-1}\left(\frac{1+x}{1-x}\right), then dydx=\frac{dy}{dx}= (a) 11+x2\frac{1}{1+x^2} (b) −11+x2-\frac{1}{1+x^2} (c) 21+x2\frac{2}{1+x^2} (d) −21+x2-\frac{2}{1+x^2}

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