Need some direction please:
I am after finding out proof for SOH CAH TOA. How did it come about that Sin (theta)=Opp/hyp? Would you be able to show me or refer me to a website?

Question

Need some direction please:
I am after finding out proof for SOH CAH TOA. How did it come about that Sin (theta)=Opp/hyp? Would you be able to show me or refer me to a website?

nitroster · Answer

To be honest, Idk if there even are proofs for Sin Cos and Tan. I may have just forgotten? It wasn't so long ago for me, I cant recall of any proofs sorry!

freckles · Answer

it is just definition

marigirl · Answer

yes but there should be some explanation for this definition

terenzreignz · Answer

It's a definition.  If you want to prove the SOHCAHTOA formulas, we'll have to have some other definition for the sine, cosine, tangent functions first ^^

terenzreignz · Answer

Did you post a link? I didn't see it. Slow internet T.T

marigirl · Answer

http://math2.org/math/algebra/functions/trig/ this person looked at all the possibilities for ratios and it kind of makes sense.