Доказать тождество: (ctg^2 a-cos^2 a/ctg^2 a)+(sin a*cos a/ctg a)=1 a-Альфа

Question

Доказать тождество: (ctg^2 a-cos^2 a/ctg^2 a)+(sin a*cos a/ctg a)=1

a-Альфа

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Answer 1

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