Help with geometry question with law of sine and cosine

Question

A true bearing measures points in a clockwise direction around the north-south line. Due north has a bearing of 0° or 360°. Due east has a bearing of 90°, due south has a bearing of 180°, and due west has a bearing of 270°.

A ship is located at point B on a map.

What is a true bearing of its position?

Answer 1

I will attempt to answer this without seeing the map or diagram.  As Philip pointed out, you need 2 points to determine a bearing.

 

Suppose you want the true bearing of a ship at point B, and you are observing it from point A.  On a chart, draw a straight line in the north-south direction that passes through point A.  Then draw a straight line from point A to point B.  Measure the angle between the two lines in the clockwise direction from the north-south line to the A-to-B line, starting at the north end of the north-south line, and rotating toward the A-to-B line in the clockwise direction.  The measured angle will be the true bearing of the ship at B, as seen from A.