Упростите выражение (cos x - sin x)^2 + 2sin x cos x

Question

Упростите выражение (cos x - sin x)^2 + 2sin x cos x

Answer 1

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Answer 2

(cosx - sinx)^2 + 2sinx cosx = cos^2 x - 2sinx cosx + sin^2 x + 2sinx cosx = 1