threewood14 wrote:Because that is the hardest way to prove it! Its so hard in fact, you haven't been able to prove it using the law of sines yet! Infact, none of us here have been able to!!!
I thought that mathematicians strove to find the most elegant proofs, not the hardest ones!
Besides, if you can't prove it using easier methods, what makes you think you are going to be able to prove it using hard ones? Work your way up.