CBSE

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

Problem

ddx(sec⁡x+tan⁡xsec⁡x−tan⁡x)=\frac{d}{dx}\left(\frac{\sec x+\tan x}{\sec x-\tan x}\right)= (a) 2cos⁡x(1−sin⁡x)2\frac{2\cos x}{(1-\sin x)^2} (b) cos⁡x(1−sin⁡x)2\frac{\cos x}{(1-\sin x)^2} (c) 2cos⁡x1−sin⁡x\frac{2\cos x}{1-\sin x} (d) None of these

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