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Татьяна009
@Татьяна009
October 2021
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Упростите выражение:
а) sin^2t+cos^2t/1-cos^2t далее из этой дроби вычитаем эту: cos^2t/1-cos^2t
б) tgt*ctgt-sin^2t
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solvo
a)(sin^2t+cos^2t)/(1-cos^2t) -cos^2t/(1-cos^2t)= 1/sin^2t-
cos^2t/sin^2t=(1-cos^2t)/(sin^2t=sin^2t/sin^2t=1.
б) tgt*ctgt-sin^2t=1-sin^2t=cos^2t.
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Answers & Comments
б) tgt*ctgt-sin^2t=1-sin^2t=cos^2t.