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In Delta ABC , sum sin""(A)/(2) cos""((B...

In `Delta ABC , sum sin""(A)/(2) cos""((B-C)/(2))=`

A

`4 cos""(A)/(2) cos ""(B)/2 cos""(C)/(2) `

B

`4 sin""(A)/(2) sin""(B)/(2)sin""(C)/(2)`

C

`8 cos""(A)/2 cos""(B)/(2) cos""(C)/(2)`

D

`1+4 sin""(A)/(2)sin""(B)/2 sin""(C)/(2)`

Text Solution

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The correct Answer is:
D
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