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General solution of cos3x=cos2x is...

General solution of `cos3x=cos2x` is

A

`npi, (npi)/(5), ninZ`

B

`2npi, (2npi)/(5), ninZ`

C

`npi, (2npi)/(5), ninZ`

D

`2npi, (npi)/(5), ninZ`

Text Solution

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The correct Answer is:
B
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