Question

Prove That :
___________
SinA/2=sqrt{(c-b)/2c}

Answer 1

?? what are b and c??

Answer 2

variables :D

Answer 3

look i will tell u where i stopped at :D..
I began with the L.H.S :SinA/2
and then i worked on the law sqrt{(1-cosA)/2}

Answer 4

use the relation:\[\sin(A/2)=\frac{1-\cos(A)}{2}\]

Answer 5

and at the substitution I faced the problem

Answer 6

sorry that should be \[\sin^2(A/2)=...\]

Answer 7

no thats right @asnaseer

Answer 8

is it a right angled triangle??

Answer 9

now use this for the right-angled triangle I drew above:\[\sin^2(A/2)=\frac{1-\cos(A)}{2}\]

Answer 10

Its right angled triangle at C ,