TRIGONOMETRY

Trigonometry in the Long Nineteenth Century.

Most material in Net Advance Retro antedates 1920. It may be obsolete or incorrect.

- General:
- Elements of Trigonometry and Trigonometrical Analysis, Preliminary to the Differential Calculus by Augustus De Morgan [London: Taylor and Walton, 1837]
- Trigonometry and Double Algebra by Augustus De Morgan [London: Taylor, Walton, and Maberly, 1849]

- Type: SPHERICAL:
- A Treatise on Spherical Trigonometry and Its Application to Geodesy and Astronomy, with Numerous Examples by John Casey [Dublin: Hodges and Figgis, 1889]