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Question

Find dydx, if y=sin1x+sin11x2,1x,1.

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Solution

Given, y=sin1x+sin11x2

Putting sin1x=θ x=sinθ y=θ+sin11sin2θ y=θ+sin1(cos θ) [ 1sin2θ=cos2θ] y=θ+sin1sin(π2θ) y=θ+π2θ=π2( sin(π2θ)=cos θ) y=π2

On differentiation w.r.t. x, we get dydx=0


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