Test on chapter 8 on Monday, Feb. 27
Assignment: Ch. 8 Review #2
Answers to 2nd page of Review Sheet #1
We went over the first page of the review sheet in class on Friday.
22. x = 4 radical 2; y = 4 radical 6; z = 8 radical 2
23. a. r/t b. r/s c. s/t d. r/t
24. cos 41 = y/15; sin 49 = y/15
25. tan 26 = 20/y; tan 64 = y/20
26. sin 40 = 8/y; cos 50 = 8/y
27. tan angle 1 = 8/5
28. cos angle 1 = 6/10
29. sin angle 1 = 7/25
30. 15 meters
Solving Right Triangles page
9. AB = 17.9; angle A = 63.4 degrees; angle B = 26.6 degrees
13. angle Z = 62.5 degrees; XZ = 17.8; XY = 15.8
15. angle D = 59 degrees; DE = 10.5; DF = 20.4
18. 229.4 meters
19. height going up: 21.8 ft; height going down = 42.0 ft; total height = 63.8 ft
Answers to review sheet #2
Special Right Triangles page
1. acute
2. obtuse
3. acute
4. right
5. not possible
6. right
7. right
8. obtuse
9. right
10. x = 11; y = 11 radical 2
11. x = radical 2; y = 2
12. x = 5; y = 5
13. x = 40; y = 20 radical 3
14. x = 3 radical 3; y = 6 radical 3
15. x = 4 radical 2
16. x = 7 radical 3; y = 60
17. x = 2 radical 3 over 3; y = 2 radical 3; z = 4; v = 4 radical 3 over 3
18. 8 radical 3
19. 24 radical 2
20. 30
Sine, Cosine, and Tangent Ratios page
1. 12/13
2. 5/13
3. 12/13
4. 12/5
5. 5/12
6. 5/13
7. .0523
8. .8660
9. 1.1106
10. .9816
11. 19 degrees
12. 61 degrees
13. 68 degrees
14. 50 degrees
15. 36 degrees
16. 39
17. 12
18. 19
19. 48
20. 34
21. x = 44; y = 57
22. x = 17; y = 11
Trigonometry Application Problems
1. 24.1 km
2. 26.0 meters
3. about 74 degrees
4. a. 8.5 degrees (about 9 degrees) b. about 4.7 feet
5. angle A = 35.4 degrees; angle C = 54.6 degrees; side AB = 15.5
6. angle Z = 31 degrees; side XY = 12.6; side YZ = 24.5
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