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Odd problems only Practice Exercises 19-34. Evaluating trigonometric functions Without using a calcu- lator, evaluate the following expressions or state that the quantity is undefined.

Odd problems only

Practice Exercises 19-34. Evaluating trigonometric functions Without using a calcu- lator, evaluate the following expressions or state that the quantity is undefined. 19. cos (2TT / 3) 20. sin (217 / 3) 21. tan (-37 /4) 22. tan (1517 / 4) 23. cot (-13TT / 3) 24. sec (7TT / 6) 25. cot (-171 /3) 26. sin (1617 / 3) 27. cos 0 28. sin (-T /2) 29. cos (-TT ) 30. tan 3TT 31. sec (5TT / 2) 32. cot TT 33. cos ( 7 / 12) (Hint: Use a half-angle formula.) 34. sin (3TT / 8) 35_46 Solving trigono ions Solve the following

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