Mathematics, 23.01.2020 19:31 johnboat

An observer (o) is located 900 feet from a building (b). the observer notices a helicopter (h) flying at a 49° angle of elevation from his line of sight. how high is the helicopter flying over the building?

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An observer (o) is located 900 feet from a building (b). the observer notices a helicopter (h) flyin...

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