Images 2 TG A SIN 2A

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2 tg a sin 2a. 1/1+Tg2a. Доказать тождество 1-cos2a / 1+cos2a = TG ²a. 1+ Tg2a 1/cos2a. 2tga/1+tg2a.
1/1+Tg2a. Доказать тождество 1-cos2a / 1+cos2a = TG ²a. 1+ Tg2a 1/cos2a. 2tga/1+tg2a.

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