The function defined by , where is the Cosine. The Maclaurin Series of the secant is
See also Alternating Permutation, Cosecant, Cosine, Euler Number, Exsecant, Inverse Secant
References
Abramowitz, M. and Stegun, C. A. (Eds.). ``Circular Functions.'' §4.3 in
Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing.
New York: Dover, pp. 71-79, 1972.
Spanier, J. and Oldham, K. B. ``The Secant and Cosecant Functions.''
Ch. 33 in An Atlas of Functions. Washington, DC: Hemisphere, pp. 311-318, 1987.