Автор - kizimaulia89

sin2x/ctgx × sin2x помогите пжжжж

Ответ

Проверено экспертом

Автор - zzhash

frac{sin 2x}{cot x} cdot sin 2x= frac{2sin x cos x}{frac{cos x}{sin x}} cdot 2sin x cos x = frac{4sin^2 x cos^2 x}{frac{cos x}{sin x}} =  frac{4 sin^3x cos^2 x}{cos x} = 4sin^3 x cos x

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