Secant
The function defined by 
, where 
is the Cosine. The Maclaurin Series of thesecant is
where
is an Euler Number.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.
- Proclus' Axiom
- Procrustian Stretch
- Product
- Product Formula
- Product-Moment Coefficient of Correlation
- Product Neighborhood
- Product Rule
- Product Space
- Program
- Projection
- Projection Operator
- Projective Collineation
- Projective General Linear Group
- Projective General Orthogonal Group
- Projective General Unitary Group
- Projective Geometry
- Projective Plane
- Projective Plane PK2
- Projective Space
- Projective Special Linear Group
- Projective Special Orthogonal Group
- Projective Special Unitary Group
- Projective Symplectic Group
- Projectivity
- Prolate Cycloid