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If cos 2 alpha =(3 cos 2 beta -1)/( 3-co...

If `cos 2 alpha =(3 cos 2 beta -1)/( 3-cos 2 beta),` then `tan alpha=` ........... A) `sqrt2 tan beta` B) `(tan beta)/( sqrt2)`
C) `(tan ^(2) beta)/( sqrt2)` D) `tan beta`

A

`sqrt2 tan beta`

B

`(tan beta)/( sqrt2)`

C

`(tan ^(2) beta)/( sqrt2)`

D

`tan beta`

Text Solution

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The correct Answer is:
A
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