Definition:Hyperbolic Cosecant

Definition
The hyperbolic cosecant function is defined on the complex numbers as:


 * $\operatorname{csch}: X \to \C$:


 * $\forall z \in X: \operatorname{csch} z := \dfrac 2 {e^z - e^{-z}}$

where:
 * $X = \left\{{z : z \in \C, \ e^z - e^{-z} \ne 0}\right\}$

Also see

 * Definition:Hyperbolic Sine
 * Definition:Hyperbolic Cosine
 * Definition:Hyperbolic Tangent
 * Definition:Hyperbolic Cotangent
 * Definition:Hyperbolic Secant