In any `triangle ABC`, prove that `a sin A-b sin B -=c sin (A-B)`.

In any triangle ABC,prove that a sin (B-C)+b sin(C-A)+c sin(A-B)=0

In any triangle ABC, prove that : sin (A + B) = sin C .

In any triangle ABC, prove that: a sin(B-C)+bs in(C-A)+c sin(A-B)=0

In triangle ABC , prove that sinA=sin(B+C)

In any triangle ABC, prove that : a sin (B -C) + b sin (C -A) +c sin (A-B) = 0 .

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

In any triangle ABC, prove that (sin A)/(sin B + sin C) + (sin B)/(sin C + sin A) + (sin C)/(sin A + sinB) ge 3/2 .

In any triangle ABC, prove that following: b sin B-C sin C=a sin(B-C)

In a triangle ABC, prove that b^(2) sin 2C+c^(2) sin 2B=2bc sin A .

In any triangle ABC, prove that : a^3 sin (B-C)+ b^3 sin (C-A)+ c^3 sin (A-B)=0 .