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If (cosx-cosalpha)/(cosx-cosbeta)=(sin^(...

If `(cosx-cosalpha)/(cosx-cosbeta)=(sin^(2)alphacosbeta)/(sin^(2)betacosalpha)`, then

A

`cosx=(cosalpha+cosbeta)/(1+cosalphacosbeta)`

B

`cosx=(cosalpha+cosbeta)/(1-cosalphacosbeta)`

C

`"tan"(x)/(2)="tan"(alpha)/(2)"tan"(beta)/(2)`

D

`"tan"(x)/(2)=-"tan"(alpha)/(2)"tan"(beta)/(2)`

Text Solution

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The correct Answer is:
A, C, D
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