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1. A closed-circuit camera is mounted on a 7.5 feet wall above a security desk. if it is used to view an entrance door 9.5 feet away from the desk. find the angle of depression from the camera lens to the entrance door.

2. The angle of depression from a search light to its target is 58°. How long is the beam of light if the search light is 26 feet above the ground?

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Neat and step-wise soltuion is provided.

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(1) Let the angle of depression be theta. Then we have

tan theta = 7.5/9.5 = ...

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