Definition:Real Hyperbolic Secant/Definition 1

Definition
The real hyperbolic secant function is defined on the real numbers as:


 * $\sech: \R \to \R$:


 * $\forall x \in \R: \sech z := \dfrac 2 {e^x + e^{-x} }$

Also see

 * Equivalence of Definitions of Real Hyperbolic Secant


 * Definition:Real Hyperbolic Sine
 * Definition:Real Hyperbolic Cosine
 * Definition:Real Hyperbolic Tangent
 * Definition:Real Hyperbolic Cotangent
 * Definition:Real Hyperbolic Cosecant