The Forgotten Method of Prosthaphaeresis
In this post, I discuss the method of prosthaphaeresis, a proto-logarithm that enabled celestial navigation for the quarter-century predating the introduction of Napier’s logarithm.
Tag Archives: trigonometry
Integrating Secant
The integral formula for secant is often introduced in a very artificial way. In this post, I look at the history of this integral and give several derivations.
a. w. walker 