prove sin^2 (x/2)= 1/2(1-cosx) using one side
K Kesha New member Joined Nov 6, 2007 Messages 2 Nov 6, 2007 #1 prove sin^2 (x/2)= 1/2(1-cosx) using one side
J jwpaine Full Member Joined Mar 10, 2007 Messages 723 Nov 6, 2007 #2 Wow. That looks like a fun identity! What have you tried on your own thus far? Thanks! John
K Kesha New member Joined Nov 6, 2007 Messages 2 Nov 6, 2007 #3 well sin(x/2)= square root of[(1-cosx)/2]
D Deleted member 4993 Guest Nov 6, 2007 #4 Kesha said: well sin(x/2)= square root of[(1-cosx)/2] Click to expand... It is correct - How did you get that?
Kesha said: well sin(x/2)= square root of[(1-cosx)/2] Click to expand... It is correct - How did you get that?
