Definition:Hyperbolic Cosine/Real

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


 * $\cosh: \R \to \R$:


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

Also see

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


 * Equation of Catenary