What is the Unit Circle?
The unit circle is a circle with a radius of 1 centered at the origin in the coordinate plane. It is a fundamental concept in trigonometry, used to define the sine, cosine, and tangent functions.
Key Angles
Some of the key angles on the unit circle include 0°, 90°, 180°, and 270°, corresponding to 360° in a complete circle.
Interactive Learning
Play around with our interactive unit circle tool to better understand angles and their sine and cosine values.