Unit Circle

° = π/4 rad

Angle

Degrees

45°

Radians

π/4

Quadrant

Reference ∠

45°

        P = (cos θ, sin θ)
      

Trig Values

Common Angles

Settings

Angle Unit

Degrees

Radians

Snap to Angle

Free

15°

30°

45°

Construction Lines

Reference Triangle

Tangent Line at x=1 (tan, sec)

Cotangent Line at y=1 (cot, csc)

Reciprocal Functions

Show csc, sec, cot values

Show exact values (√, fractions)

Overlays

Grid lines

Quadrant labels (I II III IV)

Common angle marks

Axis values (±0.5, ±1)