If a,b,c are in HP . then, ab+bc=2ac.using this prove that sin2(A/2).sin2(B/2)+sin2(B/2).sin2(C/2)= 2sin2(A/2).sin2(C/2)
If a,b,c are in HP . then, ab+bc=2ac.
using this prove that
sin2(A/2).sin2(B/2)+sin2(B/2).sin2(C/2)= 2sin2(A/2).sin2(C/2)