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The value x in 0lexlepi such that cos2x=...

The value x in `0lexlepi` such that `cos2x=cosx` are

A

0 and `(2pi)/(3)`

B

`(pi)/(3)` and `(2pi)/(3)`

C

0 and `(pi)/(3)`

D

`(pi)/(4)` and `(pi)/(3)`

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