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Question

The angle of intersection of the curves y2=2xπ and y=sinx is


A

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B

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C

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D

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Solution

The correct option is B


The curves y2=2xπ and y=sin x intersect at (0,0) and (π2,1). Let the gradients of the tangents to the curves be m1 and m2 respectively. Then m1=dydx=1πy and m2=dydx=cosx


At(π/2,1),m1=1π,
m2=cosπ2=0
Thus tanθ=(1/π)01+(1/π)(0)=1π


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