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Tg 2t. Sin2x cos2x. Уравнение cos2x + sin2x. Sin2x+cos2x 1. 2 Sin x - 3 cos x = 4.
Sin2x cos2x. Уравнение cos2x + sin2x. Sin2x+cos2x 1. 2 Sin x - 3 cos x = 4.