Question

plss given me answer​

Answer 1

refer to the above attachment for solution.

Answer 2

Step-by-step explanation:

A + B + C = π

R.H.S = cos(A/2)

[substituting the value of A

from above equation]

= cos [(π - B+C)/2]

= cos [ π/2 - (B+C)/2]

= sin [(B+C)/2]

= L.H.S

Hence proved

hope it helps uh......