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Trigonometry on the Sphere

Most trigonometry students look at triangles on a flat surface. However, people from ancient astronomers to modern navigators calculated the arc lengths and angles of triangles on a sphere. They used ...
Nature

A Treatise on Spherical Trigonometry, and its Application to Geodesy and Astronomy

THIS is a sequel to the large “Plane Trigonometry” by the same writer, and is naturally drawn up on the same plan. Its size is handy, and yet it contains a very large amount of matter. Much of this ...
insider.si.edu

Geometric Models for Spherical Trigonometry by A. Harry Wheeler and his Students Kello Kern Bland and D. Parker

Click to open image viewer. Geometric Models for Spherical Trigonometry by A. Harry Wheeler and his Students Kello Kern Bland and D. Parker CC0 Usage Conditions ApplyClick for more information. IIIF ...
Nature

Spherical Trigonometry

THIS volume gives a systematic treatment of the subject of spherical trigonometry, based on the sound foundation of Todhunter rearranged and amplified. While the merit of the original work is ...