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If cos(theta + phi) = m cos (theta - phi...

If `cos(theta + phi) = m cos (theta - phi)`, then `tan theta` is equal to :

A

`(1+m)/(1-m)tan phi`

B

`(1-m)/(1+m)tanphi`

C

`(1-m)/(1+m)cotphi`

D

`(1+m)/(1-m)secphi`

Text Solution

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The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS AND IDENTITIES-Chapter Test
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