Find the derivative

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SujitTiwari · Answer 1 · 2022-06-18T10:31:00+0000

\(\frac{dy}{dx} = \frac d{dx}\left(\frac x{cos x}\right)\)

\(= \cfrac{cosx \frac{dx}{dx}- x \frac d{dx}cosx}{cos^2x}\)

\(= \frac{cos\,x + xsin\,x}{cos^2x}\)