Упростмте :sin2x-ctgx*tgx

Question

Упростмте :sin2x-ctgx*tgx

Answer 1

Sin2x - ctgx*tgx = sin2x - 1 = 2sinxcosx - 1

Comments

sinx/tgx*cosx

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соs2x/1+sinx

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помогите

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1+sinx=cosx?

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otvet eto?)

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аааа