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Question

What is the maximum value of sinxcosx.

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Solution

sinxcosx=12×2sinxcosx=12×sin2x as we know that sin2x =2sinxcosxSo we get sinxcosx=12×sin2xNow maximum value of sin function is 1 so sinxcosx=12×1=12So 1/2 is the maximum value.

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