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Cos2x tg. CTG (3п/2 - x). TG(P/6 X)=1/2. 7cosx-4cos3x 2корень 3sin2x. 4sin 2 x Pi/2 ctgx на промежутке -5pi -4pi.
CTG (3п/2 - x). TG(P/6 X)=1/2. 7cosx-4cos3x 2корень 3sin2x. 4sin 2 x Pi/2 ctgx на промежутке -5pi -4pi.

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