Question

In the triangle ABCprove that sin A+B/2 =cos C/2​

Answer 1

Answer:

L.H.S. =

4sin(A/2)sin(B/2)sin(C/2)

4sinAsinBsinC

=8cos(A/2)cos(B/2)cos(C/2) ∵sinA=2sin(A/2)cos(A/2) etc

Answer 2

Answer:

a+b/2=cos c/2

Step-by-step explanation:

a+b/2=<cosc/2