Sophia: Triangles in the Unit Circle: Lesson 3

Here's the right task to investigate right triangles in the unit circle. A short performance task has learners determine the product of two side lengths in a unit circle. They must apply similarity concepts and trigonometric ratios to...

You and your learners will enjoy having a nicely organized, typed up unit circle, all filled in with degrees and radians as well as cartesian coordinates. 

Can you use triangles to create a circle? Learners develop the unit circle using right triangle trigonometry. They then use the unit circle to evaluate common sine and cosine values.

It's not just any circle—it's the unit circle. The fourth lesson in the series is an introduction to the famous unit circle. While working through a series of activities, young scholars learn the components of the unit circle and how to...

In this video, Sal shows how the sine and cosine of an angle are defined on the unit circle. He inscribes a 30-60-90 triangle in the unit circle and explains how to use SOH-CAH-TOA to find the circle's coordinates.

This lesson explores the relationships between triangles made on a unit circle and the six trigonometric functions. It is 4 of 5 in the series titled "Triangles in the Unit Circle."

This lesson explores the relationships between triangles made on a unit circle and the six trigonometric functions. It is 1 of 5 in the series titled "Triangles in the Unit Circle."

[Free Registration/Login may be required to access all resource tools.] Definition of reference angle shown on the unit circle.

It's all about the patterns! Young scholars learn that the unit circle repeats itself in all four quadrants. Using these patterns, they evaluate the sine, cosine, and tangent of special angles.

The x and y coordinates of the unit circle are discussed here, in the context of right triangles. This lesson [3:19] is 1 of 5 in the series titled "Coordinates on the Unit Circle."