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Tg t. TG(T-3п). TG(п2-t). TG(П- T)•sin(3п/2+t)/cos(п+t)•TG(3п/2+t)=TG^2t.
TG(T-3п). TG(п2-t). TG(П- T)•sin(3п/2+t)/cos(п+t)•TG(3п/2+t)=TG^2t.

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