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The maximum value of sin cos of 4 trigonometric functions required in senior one mathematics.
sinxcosx= 1/2sin2x

Because-1≤sin2x≤ 1

Therefore:-1/2 ≤ sinxcosx =1/2sin2x ≤1/2.

That is, the maximum value of sinxcosx is 1/2, and the minimum value is-1/2.

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