waecmaths question:
The angle of elevation of an aircraft from a point K on the horizontal ground is 30o. If the aircraft is 800m above the ground. How far is it from K?
Option A:
400.00m
Option B:
692.82m
Option C:
923.76m
Option D:
1,600.00m
waecmaths solution:
$\begin{align} & \sin {{30}^{\circ }}=\frac{800m}{x} \\ & x=\frac{800m}{\sin {{30}^{\circ }}}=\frac{800}{\tfrac{1}{2}}=1600m \\\end{align}$
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