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X2 p. 2 TG X CTG X 3 0. CTG^3 X + CTG^2 X + CTG X + 2 = 0. TG X - 3ctg x =0. 3ctg2x=0.
2 TG X CTG X 3 0. CTG^3 X + CTG^2 X + CTG X + 2 = 0. TG X - 3ctg x =0. 3ctg2x=0.

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