Prove the triangle identity
Hi everybody, I need your help again. I have to prove the following identity:
For every triangle (a,b,c represents length of sides and opposite angles)
I know I should use laws of sine and cosine but I couldn't complete it.
Also sorry for my post, I'm on my tablet so I didn't use equation editor.
Alpha - opposite of a
Beta - opposite of b
Gama - opposite of c
Re: Prove the triangle identity
It would help if you would distinguish between "A", the measure of an angle, and "a", the length of the side opposite that angle.