question archive An airplane, flying at an altitude of 6 miles, is on a flight path that passes directly over an observer

An airplane, flying at an altitude of 6 miles, is on a flight path that passes directly over an observer

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An airplane, flying at an altitude of 6 miles, is on a flight path that passes directly over an observer. Let θ be the angle of elevation from the observer to the plane. Find the distance d from the observer to the plane when:

a) θ = 30°

b) θ = 90°

c) θ =  120°

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a)12

b)6

c)6.9f

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