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Linamil
@Linamil
July 2022
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Упроcтите выражения 1)1+cos2x+2sin^2x
2)2sin^2a-1 3)sin^2x+cos^4x-0,75
4)2cos^2x-1
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dotakill2013
1)1 + cos2x + 2 sin^2x= 1 + 1 - 2sin^2x + 2sin^2x=2
2)2sin^2a-1= -cos^2a
4)2cos^2x-1= cos2a
3)не знаю чет не получается
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Answers & Comments
2)2sin^2a-1= -cos^2a
4)2cos^2x-1= cos2a
3)не знаю чет не получается