How do you know which equation to use, and how do you rearrange them?!
SohCahToa
Soh is Sin(°)=opposite/hypotenuse
Cah is Cos(°)=adjacent /hyp
Toa is Tan(°)=opp/adj
That is the easiest way to remember it
It depends on which bit is confusing you.
If you are confused about which is opp and which is adj maybe this will help. :)
It is a bit boring a guess but he explains fairly well. :)
https://www.youtube.com/watch?v=PbAXwuOTWZA
+2752 
