1. The chapter "Some Applications of Trigonometry" is mainly used to find:
A. Area of circles
B. Heights and distances
C. Probability
D. Statistics

2. Applications of trigonometry are based on:
A. Right-angled triangles
B. Circles
C. Rectangles
D. Polygons

3. The angle formed between the horizontal line and the line of sight when looking upward is called:
A. Angle of Depression
B. Angle of Elevation
C. Right Angle
D. Reflex Angle

4. The angle formed when looking downward from an object is called:
A. Angle of Elevation
B. Acute Angle
C. Angle of Depression
D. Obtuse Angle

5. The line from the observer's eye to the object is called:
A. Radius
B. Diameter
C. Line of Sight
D. Chord

6. When a person looks at the top of a building, the angle formed is:
A. Depression
B. Elevation
C. Reflex
D. Straight

7. When a person on a tower looks down at a car, the angle formed is:
A. Elevation
B. Right Angle
C. Depression
D. Acute Angle

8. The angle of elevation is always measured:
A. Below the horizontal line
B. From the vertical line
C. Above the horizontal line
D. From the object

9. The angle of depression is always measured:
A. Above the horizontal line
B. Below the horizontal line
C. From the ground
D. From the object

10. To find the height of a tower, we commonly use:
A. Probability
B. Trigonometry
C. Statistics
D. Algebra

11. The trigonometric ratio most commonly used for heights and distances is:
A. Sin θ
B. Cos θ
C. Tan θ
D. Sec θ

12. If height is known and distance is unknown, which ratio is often used?
A. Tan θ
B. Sin θ
C. Cos θ
D. Cot θ

13. If θ = 45°, then tan θ equals:
A. 0
B. 1/√3
C. 1
D. √3

14. A ladder leaning against a wall forms a:
A. Circle
B. Right Triangle
C. Rectangle
D. Polygon

15. The height of a building and its shadow can form:
A. Right Triangle
B. Circle
C. Square
D. Trapezium

16. The shadow of an object is usually considered:
A. Hypotenuse
B. Perpendicular
C. Base
D. Radius

17. The height of an object is generally considered:
A. Base
B. Radius
C. Perpendicular
D. Diameter

18. The distance between observer and object is usually:
A. Hypotenuse
B. Base
C. Radius
D. Chord

19. The angle between the ground and line of sight to the top of a tower is:
A. Depression
B. Elevation
C. Reflex
D. Straight

20. If tan θ = 1, then θ =
A. 30°
B. 45°
C. 60°
D. 90°