Hi all, my 3rd thread today (embarrassed)
I have an exercise that's really annoying me, it was given by an engineer friend of mine. Here it goes.
ABC is a triangle. a=BC b=AC c=AB p=semi-perimetre of the triangle
Al Kashi's formula is--> a2=b2+c2-2bc*cos(^A) "angle A"
1/a. Prove that...