In a `DeltaABC`, prove that : `sin3A sin(B-C)+sin3B sin(C-A) + sin3C sin (A-B)=0`.

In a DeltaA B C ,\ prove that , sin^3Acos(B-C)+sin^3B cos(C-A)+sin^3\ C cos(A-B) = 3\ sin A\ sin B \ sin C

In any DeltaABC , prove that (sin B)/(sin(B+C) ) = b/a

In any DeltaABC , prove that (sinA)/(sin(A+B))=a/c

In DeltaABC , prove that: sin2A+sin2B+sin2C=4sinAsinBsinC

In DeltaABC ,prove that: sin2A + sin2B-sin2C=4cosA cosB sinC

In any triangle ABC, prove that sin^3Acos(B-C)+sin^3Bcos(C-A)+sin^3Ccos(A-B) = 3sinAsinBsinC

Prove that sin2A + sin2B + sin2C = 4sinA · sinB · sin C

19. Prove that sin(A +B) sin(A-B)+sin(B+C)sin(B-C) + sin(C+A) sin(C-A)=0

In DeltaABC ,prove that: a) sin2A + sin2B-sin2C=4cosA cosB sinC

In any DeltaABC , prove that : a cos A + b cos B + c cos C = 2a sin B sin C