A great circle crosses the equator at 134°E. It will also cross the equator at what other longitude?
Official USCG Answer & Rule Citation
Correct Answer: Option B — 46°W
A great circle bisects the Earth, meaning its equatorial intersections are antipodal points separated by 180°. Subtracting 134°E from 180° gives 46°, changing the hemisphere from East to West to yield 46°W in accordance with spherical trigonometry principles found in Bowditch.
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