Problem 45180. All flights lead to Idaho Falls

David Hill

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Using spherical trigonometry and great circle paths, determine the distance (in kilometers) and the initial flight heading (from true North) to the Idaho Falls airport (43d30m49.4sN, 112d4m14.7sW) from an initial starting latitude and longitude in the World. Use an Earth radius of 6371.0088 kilometers. Round to the nearest tenth of a degree or nearest kilometer.

lat='19d26m10.6sN';%input
long='99d4m20.2sW';%input
distance = 2939;%output
heading = 338.5;%output

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Last Solution submitted on May 30, 2026

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