Public-domain books

Spherical Trigonometry, for the Use of Colleges and Schools

Isaac Todhunter, 1886. Macmillan and Co., London, 5th ed., 1886

Provenance and licence

Text: Project Gutenberg eBook #19770, released August 19, 2020. The transcription's licence, as it states it:

This eBook is for the use of anyone anywhere in the United States and most other parts of the world at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.org. If you are not located in the United States, you'll have to check the laws of the country where you are located before using this ebook.

This site quotes excerpts and problems from that transcription and hosts no scans; scans are linked to their archive. The records below (problems, checks, errata) are from pd-books at b3c614f, dedicated to the public domain (CC0), export generated 2026-10-10T11:13:12Z.

Chapters

  1. Great and Small Circles 5 excerpts, 5 equations, 0 problems
  2. Spherical Triangles 6 excerpts, 3 equations, 0 problems
  3. Spherical Geometry 6 excerpts, 11 equations, 0 problems
  4. Relations between the Trigonometrical Functions of the Sides and the Angles of a Spherical Triangle 5 excerpts, 26 equations, 18 problems
  5. Solution of Right-angled Triangles 8 excerpts, 25 equations, 19 problems
  6. Solution of Oblique-Angled Triangles 6 excerpts, 42 equations, 12 problems
  7. Circumscribed and Inscribed Circles 6 excerpts, 28 equations, 10 problems
  8. Area of a Spherical Triangle. Spherical Excess 6 excerpts, 13 equations, 16 problems
  9. On certain approximate Formul\ae 7 excerpts, 24 equations, 12 problems
  10. Geodetical Operations 11 excerpts, 15 equations, 0 problems
  11. On small variations in the parts of a Spherical Triangle 5 excerpts, 26 equations, 6 problems
  12. On the connexion of Formul\ae\ in Plane and Spherical Trigonometry 15 excerpts, 31 equations, 12 problems
  13. Polyhedrons 8 excerpts, 29 equations, 16 problems
  14. Arcs drawn to fixed points on the Surface of a Sphere 4 excerpts, 16 equations, 0 problems
  15. Miscellaneous Propositions 10 excerpts, 51 equations, 20 problems
  16. Numerical Solution of Spherical Triangles 8 excerpts, 19 equations, 8 problems

Index of terms 171 terms, by chapter

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Errata (0)

None recorded yet.