Предмет: Алгебра, автор: demankovavala

ctg^2a(1-cos2a)^2-cos²2a

Ответы

Автор ответа: slawakent1

0

Ctg^ 2 a +(sin^ 2 a +cos^2a)=ctg^ 2 a+1=1/sin^ 2

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