Question

Sina/2+ sin b/2 - sin c/2 =-1+4 cos (pie-a/4)cos(pie-b/4)sin(pie-c/4)​

Answer 1

Answer:

If A+B+C=π,prove that. sinA/2 +sinB/2+sinC/2=1+4sin{(π-A)/4}sin{(π-B)/4}sin {(π-C)/4}. SUBHAJIT DHAR ...