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Ответ

Ответ дан
minslik8

Ответ:1) 1/(cos^2x)-1

2)-1/(sin^2x)+1

3)1/(cos^2x)+1/(sin^2x)

4)-sin^2x+cos^2x

5)-sin^2x+cosx+cos^2x

6)(2sinx)/(1+cosx)^2

Объяснение:

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