Finding Angles

Basic trigonomotry remember the great Indian cheif SOHCAHTOA:

Sine
Opposite
Hypotinus

Cosine
Adjacent
Hypotinus

Tangent
Opposite
Adjacent

Sin( a ) = Opposite / Hypotinus
Cos( a ) = Adjacent / Hypotinus
Tan( a ) = Opposite / Adjacent

look up trigonomitry stuff on google if i am incomprehensible.