A circle of radius 1 centred at the origin. Every angle θ corresponds to a point (cos θ, sin θ) on the circle.
Key angles
- 0°: (1, 0)
- 90°: (0, 1)
- 180°: (−1, 0)
- 270°: (0, −1)
A circle of radius 1 centred at the origin. Every angle θ corresponds to a point (cos θ, sin θ) on the circle.