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If angles A,B, and C are in A.P., then (...

If angles `A,B, and C` are in `A.P.,` then `(a+c)/b` is equal to

A

`2sin.(A-C)/(2)`

B

`2cos.(A-C)/(2)`

C

`cos.(A-C)/(2)`

D

`sin.(A-C)/(2)`

Text Solution

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The correct Answer is:
B
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