Which of the following is true in a triangle ABC [IIT Screening 2005]

1.	Which of the following is true in a triangle ABC [IIT Screening 2005]
A.	\[(b+c)\sin \frac{B-C}{2}=2a\cos \frac{A}{2}\]
B.	\[(b+c)\cos \frac{A}{2}=2a\sin \frac{B-C}{2}\]
C.	\[(b-c)\cos \frac{A}{2}=a\sin \frac{B-C}{2}\]
D.	\[(b-c)\sin \frac{B-C}{2}=2a\cos \frac{A}{2}\]
Answer» D. \[(b-c)\sin \frac{B-C}{2}=2a\cos \frac{A}{2}\]

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Which of the following is true in a triangle ABC [IIT Screening 2005]

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