**Applications of Trigonometry**Land Surveyor using Theodolite |

**(MCQs)****Q1: When a point is observed, the angle formed by the line of sight with the horizontal level where the point being viewed is above the horizontal plane is known as:**

(a) angle of triangle

(b) angle of depression

(c) angle of elevation

(d) none of these

**Q2: When we raise our hand to look at the object, the angle formed by the line of sight with**

**horizontal is known as:**

(a) obtuse angle

(b) angle of elevation

(c) angle of depression

(d) acute angle

**Q3: When we lower our hand to look at the object, the angle formed by the line of sight with**

**horizontal is known as:**

(a) obtuse angle

(b) angle of elevation

(c) angle of depression

(d) acute angle

**Q4: When the length of the shadow of a pillar is equal to its height, the elevation at source of**

**sight is:**

(a) 30°

(b) 45°

(c) 60°

(d) 90°

**Q5: A pole 10 m high casts a shadow 10 m long on the ground, then the sun’s elevation is?**

**(a) 60°**

(b) 45°

(c) 30°

(d) 90°

**Q6: The angle of depression from the top of a tower 12 m high, at a point on the ground is 30°. The distance of the point from the top of the tower is:**

(a) 12 m

(b) 4√3 m

(c) 12√3 m

(d) 24 m

**Q7: A ladder is 10 m long. It touches a wall at height of 5 m. The angle θ made by it with the horizontal is:**

(a) 90°

(b) 60°

(c) 45°

(d) 30°

**Q8: If the angle of depression of an object from a 75 m high tower is 30°, then the distance of the object from the base of tower is:**

(a) 25√3 m

(b) 50√3 m

(c) 75√3 m

(d) 150 m

**Q9: The ratio of the length of a rod and its shadow is 1 :√3. The altitude of the sun is:**

**(a) 30°**

(b) 45°

(c) 60°

(d) 90°

**Q10: The tops of two poles of height 10m and 18m are connected with wire. If wire makes an angle of 30° with horizontal, then length of wire is:**

(a) 10 m

(b) 12 m

(c) 16 m

(d) 18 m

♔Available as Online Quiz.

Answers:

1: (c) angle of elevation

2: (b) angle of elevation

3: (c) angle of depression

4: (b) 45°

5: (b) 45°

6: (b) 4√3 m

7: (d) 30°

8: (c) 75√3 m

9: (a) 30°

10: (c) 16m

1: (c) angle of elevation

2: (b) angle of elevation

3: (c) angle of depression

4: (b) 45°

5: (b) 45°

6: (b) 4√3 m

7: (d) 30°

8: (c) 75√3 m

9: (a) 30°

10: (c) 16m

Good...

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