Sophia Learning
Sophia: Coordinates on the Unit Circle: Lesson 3
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."
Sophia Learning
Sophia: Coordinates on the Unit Circle
The x and y coordinates of the unit circle are discussed here, in the context of right triangles.
Sophia Learning
Sophia: Vertically Shifting Sine and Cosine
This lesson demonstrates how the sine and cosine waves are shifted vertically.
Khan Academy
Khan Academy: Proof: All Circles Are Similar
Demonstrates how to use a unit circle on a coordinate grid to prove that all circles are similar. [1:34]