Pls provide me the answer for this question Share with your friends Share 0 Hari Shankar answered this 2(bcos²C/2 + ccos²B/2)=2b1+CosC2+c1+cosB2( here 2 gets cancelled)=b+bcosC+c+cCosB=b+c+(bcosC+cCosB)=b+c+a (because bcosC+cCos=a)=a+b+c 0 View Full Answer
