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If a,b and c are in G.P then (b - a)/(b ...

If a,b and c are in G.P then `(b - a)/(b - c) + (b + a)/(b + c)`

A

`2sin(3alpha+beta-gamma)`

B

`2cos(3alpha+beta-gamma)`

C

`cos(3alpha+beta-gamma)`

D

`sin(3alpha+beta-gamma)`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-DEMOIVRE'S THEOREM-PRACTICE EXERCISE
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  16. If cosalpha+coabeta+cosgamma=0=sinalpha+sinbeta+singamma then cos(alph...

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