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Sections

Some Applications of Trigonometry

Pick a section. You read the idea first, then answer questions on it.

1. Measuring what cannot be reached1 ideaRead
2. Before you start1 ideaRead
3. The line of sight1 ideaRead
4. The angle of elevation1 ideaRead
5. The angle of depression1 ideaRead
6. One angle, two directions1 ideaRead
7. Depression up top, elevation down below1 ideaRead
8. Turning words into a triangle1 ideaRead
9. The observer’s own height counts1 ideaRead
10. Which ratio connects the two sides1 ideaRead
11. Two triangles, one shared side1 ideaRead
12. Elevation is not measured from the vertical1 ideaRead
13. Worked: a tower’s height from one triangle1 ideaRead
14. Worked: a rope’s length using sine1 ideaRead
15. Worked: depression with the observer’s height1 ideaRead
16. Worked: a building and its flagpole1 ideaRead
17. Worked: two buildings, angle of depression1 ideaRead
18. Recap1 ideaRead
19. Where you will meet this1 ideaRead
20. Practice set: Exercise 9.11 ideaRead