Haversine formula

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Science and technology

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What Wikipedia says

The haversine formula determines the great-circle distance between two points on a sphere given their longitudes and latitudes. Important in navigation, it is a special case of a more general formula in spherical trigonometry, the law of haversines, that relates the sides and angles of spherical triangles.

Excerpt from the Wikipedia article “Haversine formula”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: CheCheDaWaff, CC BY-SA 4.0, via Wikimedia Commons.