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Use the tangent ratio to solve this problem because in effect you have the outline of a right angle triangle:

tan = opp/adj

adj = opp/tan

adj = 60.50/tan 20.24 degrees

The boat is 164.0806104 (or 164)) metres from the base of the cliff.

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Q: If A man on top of a 60.50 meter high cliff sees a boat at an angle of 20.24 degrees below his horizon how far is the boat from the base of the cliff and how far from the man?
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