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5 July, 06:46

Jared is standing on the roof of a 100 meter building doing some surveying. He spots a delivery truck at an angle of depression of 30 degrees. How far is the truck from the base of the building?

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  1. 5 July, 08:11
    0
    The truck is 173.20508 meters away because the triangle is a 30 60 90 degree triangle. Therefore you would do. 100 (radical) 3
  2. 5 July, 09:14
    0
    1st : The angle of depression 30° = the angle of elevation (from the truck to the height of the building.

    2nd:

    cos 30° = (adjacent side) / (hypotenuse)

    cos 30° = x/100, but cos 30° = (√3) / 2

    (√3) / 2 = x/100 and x = (100√3) / 2

    and x = (50.√3) = 86.60 m
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