The Unit Circle is a circle with a radius of 1. Being so simple, it is a great way to learn and talk about lengths and angles.

Frequently, especially in trigonometry, the unit circle is the circle of radius 1 centered at the origin (0, 0) in the Cartesian coordinate system in the Euclidean plane.

Aug 21, 2025 · Master the unit circle with this comprehensive guide! Learn angles, radians, coordinates, and trigonometric functions with ease.

Learn the unit circle with a labeled diagram, and practice problems in both radians and degrees. Perfect for test prep and review.

The unit circle is a circle with a radius of one unit. Learn the definition, equation of unit circle, applications in trigonometry along with examples and more.

Learn the equation of a unit circle, and know how to use the unit circle to find the values of various trigonometric ratios such as sine, cosine, tangent. Also check out the examples, FAQs.

Dec 26, 2024 · In this section, we will examine this type of revolving motion around a circle. To do so, we need to define the type of circle first, and then place that circle on a coordinate system. …

The unit circle helps us generalize trigonometric functions, making it easier for us to work with them since it lets us find sine and cosine values given a point on the unit circle.

Dec 1, 2025 · To be ready to completely fill in a unit circle, we need to review two special triangles. Start by finding the side lengths of a 30-60-90 triangle and a 45-45-90 triangle, each …

Apr 25, 2024 · A unit circle is divided into four quadrants making an angle of 90°, 180°, 270°, and 360° (in degrees) or π/2, π. 3π/2, and 2π (in radians) respectively.