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If costheta=(acosphi+b)/(a+bcosphi). Sho...

If `costheta=(acosphi+b)/(a+bcosphi)`. Show that : `tan.(theta)/(2)=pmsqrt((a-b)/(a+b))tan.(phi)/(2).`

A

`sqrt(((a-b)/(a+b)))tan "" ( phi)/( 2)`

B

`sqrt(((a+b)/(a-b)))cos "" ( phi)/( 2)`

C

`sqrt(((a-b)/(a-b)))sin "" ( phi)/( 2)`

D

none

Text Solution

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The correct Answer is:
A
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