The angle of elevation of the top of a tower height 50 m from a point 50√3 m from the foot of the tower on a horizontal plane?

30° 60° 45° 80°

30°

AB = height of tower Θ is angle of elevation tan Θ        AB      :       BC                 50      :       50 \(\sqrt {3}\)                  1       :       \(\sqrt {3}\)  ⇒  Θ = 30°