WAEC - Mathematics (2011 - No. 35)
a boy looks through a window of a building and sees a mango fruit on the ground 50m away from the foot of the building. If the window is 9m from the ground, calculate, correct to the nearest degree, the angle of depression of the mango from the window
9o
10o
11o
12o
설명
tan \(\theta\) = \(\frac{9}{50}\) = 0.18
\(\theta = tan^{-1} 0.18\)
\(\theta\) = 10.20
\(\theta = tan^{-1} 0.18\)
\(\theta\) = 10.20