## Hyperbolic Secant

The hyperbolic secant is defined as

It has a Maximum at and inflection points at .

See also Benson's Formula, Catenary, Catenoid, Euler Number, Hyperbolic Cosine, Oblate Spheroidal Coordinates, Pseudosphere, Secant, Surface of Revolution, Tractrix, Tractroid

References

Abramowitz, M. and Stegun, C. A. (Eds.). Hyperbolic Functions.'' §4.5 in Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing. New York: Dover, pp. 83-86, 1972.

Spanier, J. and Oldham, K. B. The Hyperbolic Secant and Cosecant Functions.'' Ch. 29 in An Atlas of Functions. Washington, DC: Hemisphere, pp. 273-278, 1987.