# Trigonometric ratios

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A pilot in a helicopter sights an ambulance heading toward an accident scene. He measures the angles of depression to the ambulance and the accident to be 21 degrees and 15 degrees, respectively. If the helicopter is 4000 ft from the ambulance, how far does the ambulance have to travel to get to the accident?

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##### Solution Summary

A detailed solution of a problem using angle of depression is included.

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