Question 25

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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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