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

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

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 …

If the radius was one unit, then this would be 2 pi times 1, 2 pi radiuses. So given that, let's start to think about how we can convert between radians and degrees, and vice versa.

What is the unit circle? The unit circle is a circle with a radius of 1 centered at the origin. We can use the unit circle to help define the trigonometric functions and visualize their values. Learn …

Explore advanced unit circle trigonometry concepts with interactive exercises and practice questions on Khan Academy.

There are other videos on Khan Academy that may help you. I recommend learning the basics of trigonometry first and then move on to the unit circle.

The values of sine and cosine are determined by the quadrant because of the way they're defined in the unit circle. In the unit circle, the x-coordinate of a point is the cosine of the angle formed …