Find, for places lying on the earth’s equator, the height and azimuth of the luminary, at which the hour angle was observed

Find, for places lying on the earth’s equator, the height and azimuth of the luminary, at which the hour angle was observed a = 4h (hours) and its polar distance from the north pole of the world was p = 50o.

Hour angle a = 4h = 60o. Therefore, from the drawing we get: Height h = NKM = 30o.
Azimuth A = NSK = 130o West

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