Mathematics, 19.03.2020 11:02 JasminGodoy

In the figure, A and Bare two points on the horizontal ground. AB is 6.4m and CB is 6.9m. ABC is a right angle
A sightseeing hot air balloon C is 8.9 m vertically above B. The distance between A and B is 6.4 m. Find the angle of depression of A from C.
(Give your answer correct to 3 significant figures.)

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