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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 Dπ8 I=π4∫0sin22xdx Using property of integration ⇒I=π4∫0sin2(π2−x)dx....(i) ⇒I=π4∫0cos2(π2−x)dx....(ii) Adding (i) and (ii), we get: 2I=π4∫01dx I=π8