THE author of this book, who is one of the naval instructors on H.M.S. Britannia, has brought together the most important rules which are used in the solution of spherical triangles, and, after ...

The sheets in this folder hold patterns for the following models for spherical trigonometry: Bi-Rectangular Spherical Triangle -- (B R)ST dated Jan 25-1945 Quadrantal Spherical Triangle - QST - dated ...

IN modern treatises on crystallography, the crystal is imagined projected radially on the surface of a sphere, and the spherical triangles so obtained are dealt with by spherical trigonometry.

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 ...