Ximpledu

Point on a Unit Circle

See how to find the point on a (unit) circle
using sine and cosine.
2 examples and their solutions.

Point on a Unit Circle

Formula

Unit circle: x2 + y2 = 1
Point on a unit circle: (cos θ, sin θ)
Equation of a Circle

Example

x2 + y2 = 1

Coordinates of point P?
Solution

Point on a Circle

Formula

Example

x2 + y2 = 64

Coordinates of point P?
Solution