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Charles lives in a tall apartment building. He looks out his window and spots a car on the road that runs straight toward his building. His angle of depression to the car is 24°.

Charles looks farther down the road and spots a dump truck. He estimates that the car is 800 feet in front of the dump truck. His angle of depression to the dump truck is 10°.

How far above the ground is Charles's line of sight?

 Feb 22, 2020
 #1
avatar+6252 
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let the distance to the truck be Lh=Ltan(10)h=(L800)tan(24)(L800)tan(24)=Ltan(10)L=800tan(24)tan(24)tan(10)h=800tan(24)tan(24)tan(10)tan(10)

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 Feb 22, 2020

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