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superxman
@superxman
July 2022
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(Cosx-1)^2=cos^2x-1
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sedinalana
Verified answer
(сosx-1)²-(cosx-1)(cosx+1)=0
(cosx-1)(cosx-1-cosx-1)=0
-2(cosx-1)=0
cosx-1=0
cosx=1
x=2πn,n∈z
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Answers & Comments
Verified answer
(сosx-1)²-(cosx-1)(cosx+1)=0(cosx-1)(cosx-1-cosx-1)=0
-2(cosx-1)=0
cosx-1=0
cosx=1
x=2πn,n∈z