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Name __________________________________________ Date ___________________ Period ________ Trigonometry-The Unit Circle Homework Problems 1 − 8, find the exact value of each expression. Do not use a calculator. 1. sin 5. 13π 2 sec 9π 2 2. cos ( 9π ) 3. tan ( −3π ) 4. csc 6. 7π cot 2 7. sin ( −5π ) 8. −3π cos 2 13π 2 Problems 9 − 14, find the exact value of each expression. Do not use a calculator. 9. cos 60° + tan45° 11. cot 45° sec30° 13. 5 sin270° − 3 cos 180° 10. sin30° − cos 45° 12. tan60 ° csc45° 14. tan135 ° cos 30° Problems 15 − 22, use a calculator to approximate each expression. Be sure the calculator is in the correct mode. Give answers correct to three decimal places. 15. sin38° 16. 17. tan3° 18. tan3 5π 9 19. sin 21. 5π tan − 12 ©2015 Flamingo Math.com csc59° 7π 18 20. cos 22. 2π sec − 15 Jean Adams Problems 23 − 26, find the exact value of the six trigonometric functions of the given angle. If any are not defined, say “undefined.” Do not use a calculator. 23. 5π 6 25. − 3π 4 24. 7π 3 26. − 5π 2 Problems 27 − 30, a point on the terminal side of an angle θ is given. Find the exact values of the six trigonometric functions of θ. 27. (3, −4) 29. ( −1, −1) ©2015 Flamingo Math.com 28. ( −1,2) 30. (5,12) Jean Adams