# MCQs in Trigonometry Part I - Answers

Answers key for the Compiled MCQs in Trigonometry Part 1 of the series as one topic in Engineering Mathematics in the ECE Board Exam.

Below are the answers key for the Multiple Choice Questions in Trigonometry – MCQs Part 1.

1. B. csc 20°

2. A. 30°

3. B. A + 2B = 30°

4. A. 20.705°

5. C. 20.90°, 69.1°

6. B. 5 degrees

7. D. 330°

8. B. 0.087

9. D. 8/17

10. A. 4/3

11. B. 6°

12. D. 1

13. C. sin 2Î¸

14. C. 2 tan Î¸

15. A. 1

16. B. cos Î¸

17. B. Ï€/4

18. A. 30°

19. B. 0.281

20. B. 1.34

21. C. 45, 135, 225, 315 degrees

22. A. 1

23. A. 0

24. D. cot Î¸

25. A. 32.47°

26. B. 0.256

27. C. 60°

28. A. 39.49

29. B. 374 m

30. D. 4 and 10

31. B. 4.03

32. C. 21.7°, 321.8 mph

33. D. 73.61m

34. A. 54.23 m

35. D. 25 ft., 36.87°

36. B. 79.3 m

37. A. 259.28

38. C. 0.169 m/sec

39. B. 92.54 feet

40. D. 33.51m

41. A. 34.64 cm

42. C. 341.78 m

43. C. 125 m

44. C. 14,586 sq. units

45. A. 240

46. B. 8 A.M.

47. D. 1 hour and 10 minutes

48. D. 1 hour

49. B. 74.33

50. C. 168°31’

### Online Questions and Answers in Trigonometry Series

Following is the list of practice exam test questions in this brand new series:

Trigonometry MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                        Answer key: PART II