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In Triunghiul Dreptunghic Abc Cu Ma90

FUNCTII TRIGONOMETRICE IN TRIUNGHIUL DREPTUNGHIC (ALE UNGHIULUI ASCUTIT) 2 x 0,90 0 sinx cosx tgx ctgx 1 cos2x tgx tgx 1 2 1 ctg2x 1 1 sin2x 1 tg2x 1 ctgx ...

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