Distance Meter
APPLYING TRIGONMETRY-A forest ranger spots a bear in the distance from her 10 meter tower,?
The angle of depression is 30 degress. How far away is the bear form the base of the tower?
Draw a right angled triangle, ABC ,right angled at B
A is top of tower
B is base of tower
BC is horizontal
/_ABC = 30°
tan 30° = 10 / BC
BC = 10 / tan 30°
BC = 10 / (1 / √3)
BC = 10 √3
Bear is 17.3 m from base of tower.
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