From the top of a lighthouse 18 m high, the angle of depression to sighta boat is 4°. What is the distance between the boat and the base of the lighthouse?

Trigonometry (MindTap Course List)
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ISBN:9781337278461
Author:Ron Larson
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Chapter1: Trigonometry
Section1.3: Right Triangle Trigonometry
Problem 8ECP: The angle of elevation to the top of a flagpole at a distance of 19 feet from its base is 64.6. How...
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From the top of a lighthouse 18 m high, the angle of depression to sight
a boat is 4°. What is the distance between the boat and the base of the lighthouse?

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