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A comment on Obsolete trig functions and why we don't use them anymore (2013).

Re:Obsolete trig functions and why we don't use them anymore... by scottlocklin on Thursday December 03, 2020 @05:40AM (#25287616)
Fun book I read earlier this year, which steps you through the history of trigonometry applied to navigation: "Heavenly Mathematics; the forgotten art of spherical trigonometry."

https://www.researchgate.net/publication/276103942_REVIEW_of...

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Re:Obsolete trig functions and why we don't use them anymore... by bobbybabylon on Thursday December 03, 2020 @12:08PM (#25291264)
Funnily enough, haversines and the lot can be found in Dover's Trigonometry Refresher. Had.to do some revision myself for back-to-school.

O.G. Artillery measurement and spherical navigation can be revised in that book, while spherical trig. can be practiced in the 1954 edition Schaum's Plane and Spherical Trigonometry. Good stuff.

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