From an aeroplane vertically above a straight horizontal plane, the angles of depression of two consecutive kilometres stones on the opposite sides of the aeroplane are found to be "alpha" and "beta". Show that the height of the aeroplane is:
(tan alpha * tan beta)/(tan alpha + tan beta).

Question

From an aeroplane vertically above a straight horizontal plane, the angles of depression of two consecutive kilometres stones on the opposite sides of the aeroplane  are found to be "alpha" and "beta". Show  that the height of the aeroplane is:
(tan alpha * tan beta)/(tan alpha + tan beta).

dumbcow · Answer

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hmm do i have this set up correctly?