" If "A+B-C=3 pi," then "sin A+sin B-sin C" is equal to- "

IfA+B-C=3 pi then sin A+sin B-sin C is equal to

If A+B-C=3pi,\ t h e n\ sin A+ sin B-sin C is equal to- a. 4sin(A/2)sin(B/2)cos(C/2) b. -4sin(A/2)sin(B/2)cos(C/2) c. \ 4cos(A/2)cos(B/2)cos(C/2) d. -4cos(A/2)cos(B/2)cos(C/2)

If A+B-C=3pi, t h e n sin A+ sin B-sin C is equal to- a.4sin(A/2)sin(B/2)cos(C/2) b. -4sin(A/2)sin(B/2)cos(C/2) c. 4cos(A/2)cos(B/2)cos(C/2) d. -4cos(A/2)cos(B/2)cos(C/2)

If A+B+C=pi , then sin2A+sin2B-sin2C is equal to

If A+B+C=pi , then sin(A+B)=

If A+B +c=pi, then sin (A+B)=