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If (cos3x)/(cosx)=1/3 for some angle x,0...

If `(cos3x)/(cosx)=1/3` for some angle `x,0<=x<=pi/2` then the value of `(sin3x)/(sinx)` for some `x` is

A

`(7)/(3)`

B

`(5)/(3)`

C

1

D

`(2)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
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