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For triangle ABC prove that, cos (B+C/2)= sin A/2​

Answer»

ngle ABC  A°+B°+C°=180°  A+B+C/2=180/2  A+B/2=90-C/2  MULTIPLY BY Sin Both Side  Sin(A+B/2)=Sin(90-C/2)  We Know That Sin(90-A)=COSA  So,Sin(A+B/2)=CosC/2 Thanks me MARK me as BRAINLIEST :-) Rate my answers ;) #BrainlyPrince727



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