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In DeltaABC if the angle A, B, C are in ...

In `DeltaABC` if the angle A, B, C are in A.P. then `(a+c)/sqrt(a^2-ac+c^2)=`

A

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

B

`sin((A+C)/(2)`

C

`sin(A)/(2)`

D

`sin((C)/(2))`

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The correct Answer is:
A
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