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2t t. 1+Tg2t 1/cos2t. Sin2t+cos2t+tg2t. 1+Cos2t/1-cos2t. 1-Cos2t/2.
1+Tg2t 1/cos2t. Sin2t+cos2t+tg2t. 1+Cos2t/1-cos2t. 1-Cos2t/2.