Reference Angle Calculator
Reference Angle (θ'):
55°
Quadrant II
Understanding Reference Angles
A reference angle is the smallest positive acute angle formed between the terminal side of an angle and the x-axis. It's crucial for:
- • Simplifying trigonometric calculations
- • Finding trigonometric function values
- • Solving trigonometric equations
Quick Reference
Quadrant I: θ' = θ
Quadrant II: θ' = 180° - θ
Quadrant III: θ' = θ - 180°
Quadrant IV: θ' = 360° - θ