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Max08091997
@Max08091997
August 2022
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cos^4x-sin^4x=1 решите!
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sedinalana
(cos²x-sin²x)(cos²x+sin²x)=1
cos2x*1=1
cos2x=1
2x=2πk,k∈z
x=πk,k∈z
2 votes
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Answers & Comments
cos2x*1=1
cos2x=1
2x=2πk,k∈z
x=πk,k∈z