1. Trigonometric Function: The Unit circle

2. The Unit Circle A circle with radius of 1 Equation x 2 + y 2 = 1

3. The Unit Circle with Radian Measures

4. Do you remember 30º, 60º, 90º triangles? Now they are really! Important

5. Do you remember 30º, 60º, 90º triangles? Now they are really! Important Even more important Let 2a = 1

6. Do you remember 30º, 60º, 90º triangles? Let 2a = 1

7. Do you remember 30º, 60º, 90º triangles?

8. Do you remember 45º, 45º, 90º triangles? When the hypotenuse is 1 The legs are

9. Some common radian measurements These are the Degree expressed in Radians

10. The Unit Circle: Radian Measures and Coordinates