Sophia: Coordinates on the Unit Circle: Lesson 1

Calculate exact trigonometric values using the angles of special right triangles. Beginning with a review of the unit circle and trigonometric functions, class members use their knowledge of special right triangles to find the value...

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. 

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.

Seeing structure in the patterns is key to understanding the unit circle, and it takes time to become comfortable with those relationships. The video gives learners access to repeated instruction to allow time to develop those...

The x and y coordinates of the unit circle are discussed here, in the context of right triangles. This lesson [3:08] is 2 of 5 in the series titled "Coordinates on the Unit Circle."

The x and y coordinates of the unit circle are discussed here, in the context of right triangles. This lesson [1 min., 59 sec.] is 3 of 5 in the series titled "Coordinates on the Unit Circle."

The x and y coordinates of the unit circle are discussed here, in the context of right triangles.

In this Unit Circle activity, students explore a method to help remember the coordinates of the points in the first quadrant on the unit circle.  Answers are provided as well as a completed unit circle.

This lesson explores how trigonometric functions can be represented geometrically on the unit circle. It is 1 of 5 in the series titled "Trigonometric Functions on the Unit Circle."

This lesson shows how to draw a right triangle on a unit circle. It is 1 of 7 in the series titled "Drawing a Triangle on the Unit Circle."