Download Chapter 8: Basic Trigonometry Topic 1 Homework Key

Chapter 8: Basic Trigonometry
Topic 1 Homework Key
1. The ladder reaches 77 inches up the wall.
2. The wire is about 11.8 feet long
3. Elena sees the cliff from a 68° angle.
Topic 2 Homework Key
1. The ladder reaches up 5.2 meters. It is 3meters from the wall.
2. She is viewing the monument from an 87 degree angle.
3. The ramp will take 22.86 feet.
4 −725°, −365°, 355°, 715° Q4
5. −436°, −76°, 644°, 1004° Q4
6. −675°, −315°, 405°, 765° Q1
7. 342°, 702°, 1422°, 1782° Q4
8. Yes, Q2
10. Yes, Q2
9. No
11. No
Topic 3 Homework Key
Fill out the chart below:
30°
45°
60°
sin θ
𝟏
𝟐
√𝟐
𝟐
√𝟑
𝟐
cos θ
√𝟑
𝟐
√𝟐
𝟐
𝟏
𝟐
tan θ
√𝟑
𝟑
𝟏
√𝟑
Find the exact value:
1.)
3.5
2.)
𝟏
𝟒
3.)
5
For which values (30, 45, or 60) is the fraction undefined
4.)
𝟔𝟎°
5.) 𝟔𝟎°
Workbook Pages 312-313: #4, 11, 17
4.) 𝟐𝟔. 𝟏 cm
11.) 𝟑𝟐. 𝟗°
17.) 𝟕𝟎°