The angle of elevation of the top of a lighthouse height 75.5m from a point 75.5√3 m from the foot of the lighthouse on a horizontal plane?
Answer & explanation
Correct answer: option 4
AB = height of tower
Θ is angle of elevation
tan Θ AB : BC
75.5 : 75.5\(\sqrt {3}\)
1 : \(\sqrt {3}\) ⇒ Θ = 30°