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Sidorovich
@Sidorovich
July 2022
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cos(x/3)=cos(2x)
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sedinalana
Cos(2x)-cos(x/3)=0
2sin(7x/3)sin(5x/3)=0
sin(7x/3)=0
7x/3=πk
x=3πk/7,k∈z
sin(5x/3)=0
5x/3=πk
x=3πk/5,k∈z
2 votes
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Answers & Comments
2sin(7x/3)sin(5x/3)=0
sin(7x/3)=0
7x/3=πk
x=3πk/7,k∈z
sin(5x/3)=0
5x/3=πk
x=3πk/5,k∈z