Cartesian Coordinates ```Name: Johann Status: other Age: 30s Location: N/A Country: N/A Date: 1999 ``` Question: Would you know where I could get a formula to determine the angle of travel between two cartesian coordinates. For example: someone travelling on a ship knows the degrees-minutes-seconds of the start and end location. Based on a calculation, they set their compass to an angle between 0 and 360 degrees and that is the direction the ship is to travel. The formula should have some considerable degree of accuracy. Replies: You can derive one using a textbook on plane geometry and algebra. But, if you are really talking about a ship, then you are talking not about plane geometry and Cartesian axes, because the surface of the Earth is not a plane but a sphere. Hence you need a textbook on spherical trigonometry and/or navigation. Grayce Click here to return to the Physics Archives

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