The correct evaluation of \[\int_{0}^{\pi /2}{\sin x\,\sin 2x}\] is [MP PET 1993, 2003]

The correct evaluation of \[\int_{0}^{\pi /2}{\sin x\,\sin 2x}\] is [M

1.	The correct evaluation of \[\int_{0}^{\pi /2}{\sin x\,\sin 2x}\] is [MP PET 1993, 2003]
A.	\[\frac{4}{3}\]
B.	\[\frac{1}{3}\]
C.	\[\frac{3}{4}\]
D.	\[\frac{2}{3}\]
Answer» E.

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The correct evaluation of \[\int_{0}^{\pi /2}{\sin x\,\sin 2x}\] is [MP PET 1993, 2003]

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