Images TG 2 A B

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Tg 2 a b. 1+Tg2a 1/cos2a. Sina 2 TG A/2 1+TG. Доказать тождество 2sin2a/tg2a.TGA=cos2a. Tg2a+TGA.
1+Tg2a 1/cos2a. Sina 2 TG A/2 1+TG. Доказать тождество 2sin2a/tg2a.TGA=cos2a. Tg2a+TGA.

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