Вычислите tg^(2)t+ctg^(2)t, если tgt-ctgt=1,5
tg^(2)t+ctg^2(t)=?
(tgt-ctgt)^2=tg^2t+ctg^2t-2ctg*tg=1.5
tg^2t+ctg^2t=0.5
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tg^(2)t+ctg^2(t)=?
(tgt-ctgt)^2=tg^2t+ctg^2t-2ctg*tg=1.5
tg^2t+ctg^2t=0.5