Table of contents
- 0. Review of College Algebra(0)
- 1. Measuring Angles(0)
- 2. Trigonometric Functions on Right Triangles(0)
- 3. Unit Circle(0)
- 4. Graphing Trigonometric Functions(0)
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations(0)
- 6. Trigonometric Identities and More Equations(0)
- 7. Non-Right Triangles(0)
- 8. Vectors(0)
- 9. Polar Equations(0)
- 10. Parametric Equations(0)
- 11. Graphing Complex Numbers(0)
3. Unit Circle
Reference Angles
3. Unit Circle
Reference Angles: Study with Video Lessons, Practice Problems & Examples
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67PRACTICE PROBLEM
Write the number which is closest to the value of cos 123°:
-1, -0.5, 0.5, or 1.
Write the number which is closest to the value of cos 123°:
-1, -0.5, 0.5, or 1.