Unit Circle & Trigonometry

Interactive • Exact values • Degrees & Radians

cos θ (x) sin θ (y) Angle arc Radius

Drag the point on the circle or use the controls

Angle

Degrees 0°

Radians 0

Quadrant I

Drag to change angle

Trigonometric Values

sin θ

0

cos θ

1

tan θ

0

csc θ

—

sec θ

1

cot θ

—

Signs by Quadrant

Quadrant I: All positive (sin +, cos +, tan +)

Unit circle (radius = 1) • Coordinates of the point = (cos θ, sin θ)