SOH - Sine
Sine is the ratio of the Opposite side to the Hypotenuse.
sin(θ) = Opposite / Hypotenuse
SOH CAH TOA
CAH - Cosine
Cosine is the ratio of the Adjacent side to the Hypotenuse.
cos(θ) = Adjacent / Hypotenuse
TOA - Tangent
Tangent is the ratio of the Opposite side to the Adjacent side.
tan(θ) = Opposite / Adjacent
Pythagorean Theorem
Used when solving for sides without angles.
a² + b² = c²