Consider the following for triangle ABC:1. \(\sin \left( {\frac{{{\rm{B}} + {\rm{C}}}}{2}} \right) = \cos \left( {\frac{{\rm{A}}}{2}} \right)\)2. \(\tan \left( {\frac{{{\rm{B}} + {\rm{C}}}}{2}} \right) = \cot \left( {\frac{{\rm{A}}}{2}} \right)\)3. sin (B + C) = cos A4. tan (B + C) = - cot AWhich of the above are correct?

Consider the following for triangle ABC:1. \(\sin \left( {\frac{{{\rm

1.	Consider the following for triangle ABC:1. \(\sin \left( {\frac{{{\rm{B}} + {\rm{C}}}}{2}} \right) = \cos \left( {\frac{{\rm{A}}}{2}} \right)\)2. \(\tan \left( {\frac{{{\rm{B}} + {\rm{C}}}}{2}} \right) = \cot \left( {\frac{{\rm{A}}}{2}} \right)\)3. sin (B + C) = cos A4. tan (B + C) = - cot AWhich of the above are correct?
A.	1 and 3
B.	1 and 2
C.	1 and 4
D.	2 and 3
Answer» C. 1 and 4