Question 22
TrigonometryA ladder 15 m long leans against a vertical pole, making an angle of 72° with the horizontal. Calculate, correct to one decimal place, the distance between the foot of the ladder and the pole.
- A.15.8 m
- B.14.3 m
- C.4.9 m
- D.4.6 m
Show the answer and explanation
Answer: D (4.6 m)
Explanation
The distance along the ground is the adjacent side: 15 cos 72° = 15 × 0.309 ≈ 4.6 m.