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If $y = \tan x$ , find $\frac{d y}{d x}$ .

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Correct option is C

y=tanx=sinxcosx dydx=cosxddx(sinx)-sinxddx(cosx)(cosx)2 =cosx·cosx-sinx(-sinx)cos2x=cos2x+sin2xcos2x =1cos2x=sec2x

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If y=tanx, find dydx .

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If $y = \tan x$ , find $\frac{d y}{d x}$ .