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Question

The value of π20esin xcos x dx is equal to

A
e - 1
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B
e + 1
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C
e - 2
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D
e + 2
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Solution

The correct option is A e - 1
π20esin xcos x dxLet sin x =tcos x dx=dtIf x=0, t=0 and if x=π2, t=110 et dt =(et]10=e1e0=e1

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