Question

a) sin(A+C/2) = cos (B/2)
b) sin (A+B/2) = cos (C/2)
c) cos(A+B/2) = cos (C/2)
d) cos(A-B/2)= cos (C/2)​

Answer 1

Answer:

what is this bro please write your problem

Answer 2

Answer:

sinA-sinc=o

2sin(c-d/2).cos(c+d/2)=0