Question

If A + B + C = π, then prove that
sin(A/2)+sin(B/2)-sin(C/2)=-1+4cos(π-A)/4cos(π-B)/4sin(π-C)/4​

Answer 1

Answer:

44

Step-by-step explanation:

A + B + C = π, then prove that

sin(A/2)+sin(B/2)-sin(C/2)=-1+4cos(π-A)/4cos(π-B)/4sin(π-C)/4