Question

sin (B-C) / sin B. sin C + sin (C-A) / sin C. sin A + sin (A-B) / sin A. sin B = 0​​

Answer 1

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SinA . Sin(B - C) + SinB . Sin(C - A) + SinC . Sin(A - B)=0

=>SinA . (SinBCosC - CosBSinC) + SinB . (SinCCosA - CosCSinA) + SinC . (SinACosB - CosASinB)

=>SinASinBCosC -SinACosBSinC + SinBSinCCosA - SinBCosCSinA + SinCSinACosB - SinCCosASinB

All get cancelled

=>0

Answer 2

Answer:

Step-by-step explanation: