SOH CAH TOA
sin = opp/hyp | cos = adj/hyp | tan = opp/adj
Key Angles
sin 30° = 0.5 | sin 45° ≈ 0.7 | sin 60° ≈ 0.87 | sin 90° = 1
Cosine Values
cos 30° ≈ 0.87 | cos 45° ≈ 0.7 | cos 60° = 0.5 | cos 90° = 0
Pythagorean
a² + b² = c² | sin²θ + cos²θ = 1
Vectors
Fx = F cos θ | Fy = F sin θ
Small Angle
For small θ: sin θ ≈ tan θ ≈ θ (in radians)
