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If a,b,c are sides opposite to the angle...

If a,b,c are sides opposite to the angles A,B,C, then which of the following is correct ?

A

`(b+c)cos.(A)/(2)=asin((B+C)/(2))`

B

`(b+c)cos((B+C)/(2))=asin.(A)/(2)`

C

`(b-c)cos((B-C)/(2))=acos.(A)/(2)`

D

`(b-c)cos.(A)/(2)=asin((B-C)/(2))`

Text Solution

Verified by Experts

The correct Answer is:
D
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