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Question

π40sin22xdx is equal to

A
0
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B
π2
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C
π4
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D
π8
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Solution

The correct option is D π8
I=π40sin22xdx
Using property of integration
I=π40sin2(π2x) dx....(i)
I=π40cos2(π2x) dx....(ii)
Adding (i) and (ii), we get:
2I=π40 1 dx
I=π8

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