From the top of a building 10m high the angle o... - WAEC Mathematics 1990 Question
From the top of a building 10m high, the angle of depression of a stone lying on the horizontal ground is 69o. Calculate ,correct to one decimal place, the distance of the stone from the foot of the building
A
3.6m
B
3.8m
C
6.0m
D
9.3m
correct option: b
tan21o =x/10
x = 10 tan 21o
= 3.3839 = 3.8m
x = 10 tan 21o
= 3.3839 = 3.8m
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