3d Sea Lighthouses
3d sea lighthouses
3D application of angles and bearing?
An observer at the top of a lighthouse, 100 m above sea-level, observes a ship due East and measures the angle of depression as 5,43,,. Shortly afterwards the angle of depression is 2,12,,. If the ship's course is due South, calculate the bearing of the ship from the lighthouse when the second angle of depression is measured.
Are these angles 5.43 and 2.12 degrees? Because if the first angle is 5.43 degrees, and the boat is moving due south, the angle of depression would have to get larger - If it gets smaller, the boat has to be getting closer. The way the problem is set up, the boat is at its closest in the first observation.
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