I hope you've been taught this accronym.
SOH CAH TOA
Sine - Opposite over Hypotenuse
Cosine - Adjacent over Hypotenuse
Tangent - Opposite over Adjacent
Excess Information:And to tell the truth, well you could set this up as a proportion because each angle corresponds with it's opposite side. Anyways...
Sin64 = opposite leg/18
So 18sin64 = opposite leg
If you can't figure it out from there, may God help you.








