Read the following study guide for a concept review:
Practice Questions
Find the sine and cosine of each angle.
| 1. | 45° |
| 2. | 180° |
| 3. |  |
| 4. |  |
| 5. | 135° |
| 6. |  |
| 7. | 390° |
| 8. | –60° |
| 9. |  |
| 10. |  |
| 11. | 0° |
| 12. | π |
| 13. |  |
| 14. |  |
| 15. | 330° |
| 16. |  |
Evaluate each of the following trigonometric functions.
| 17. | sec (60°) |
| 18. | csc(–30°) |
| 19. |  |
| 20. | tan(0) |
| 21. | cot(150°) |
| 22. | csc(120°) |
| 23. | sec(–45°) |
| 24. |  |
| 25. |  |
| 26. | tan(240°) |
| 27. |  |
| 28. | cot(180°) |
| 29. | csc(225°) |
Answers
| 1. |  |
| 2. | sin(180°) = 0 and cos(180°) = –1 |
| 3. |  |
| 4. |  |
| 5. |  |
| 6. |  |
| 7. |  |
| 8. |  |
| 9. |  |
| 10. |  |
| 11. | sin(0°) = 0 and cos(0°) = 1 |
| 12. | sin(π) = 0 and cos(π) =–1 |
| 13. |  |
| 14. |  |
| 15. |  |
| 16. |  |
| 17. | sec(60°) = 2 |
| 18. | csc( –30°) = –2 |
| 19. |  |
| 20. | tan(0) = 0 |
| 21. | cot(150°) = –√3 |
| 22. |  |
| 23. | sec(–45°) = √2 |
| 24. |  |
| 25. |  |
| 26. | tan(240°) = √3 |
| 27. |  |
| 28. | cot(180°) is undefined |
| 29. | csc(225°) = – √2 |
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