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If (cos x -cos alpha)/(cos x -cos beta)...

If `(cos x -cos alpha)/(cos x -cos beta)=(sin^(2)alpha cos beta)/(sin^(2)beta cos alpha)` then `cosx` is equal to

A

`(cos alpha-cos beta)/(1+cos alpha cos beta)`

B

`(cos alpha-cos beta)/(1-cos alpha cos beta)`

C

`(cos alpha+cos beta)/(1+cos alpha cos beta)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
c
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