What is the unit circle definition of the trigonometric functions? The unit circle definition allows us to extend the domain of sine and cosine to all real numbers.

Learn how to use the unit circle to define sine, cosine, and tangent for all real numbers.

While the unit circle provides an intuitive geometric interpretation of trigonometric functions, it's not necessary for performing trigonometric calculations. In practice, calculators and …

For each point on the unit circle, select the angle that corresponds to it. Click each dot on the image to select an answer.

Learn how to use the unit circle to define sine, cosine, and tangent for all real numbers.

Discover how to measure angles, distances, and heights using trigonometric ratios and the unit circle. Learn how to use sine, cosine, and tangent to solve real-world problems involving …

Learn the unit circle definition of trigonometric functions with Khan Academy's engaging and educational resources.

This topic covers: - Unit circle definition of trig functions - Trig identities - Graphs of sinusoidal & trigonometric functions - Inverse trig functions & solving trig equations - Modeling with trig …

For each point on the unit circle, select the angle that corresponds to it. Click each dot on the image to select an answer.

Sal finds the trigonometric values of π/4 using the unit-circle definition. Created by Sal Khan.