Everything About the Unit Circle (6 minutes!)
Everything you need to know about the unit circle, but in 5 minutes!
Special triangles - https://www.khanacademy.org/math/geom...
0:00 - Introduction to the Unit Circle
0:48 - Introduction to Coordinates (Special Triangles)
1:50 - Coordinates
2:33 - Introduction to Radians
2:54 - Radians
4:13 - Example Problem