Cosh

Cosh[z] gives the hyperbolic cosine of z, defined as $(e^z + e^{-z})/2$.

Examples

Compute hyperbolic cosine values:

Cosh[0]
(* 1 *)

Cosh[1.0]
(* 1.54308 *)

Cosh[Log[2]]
(* 5/4 *)

Please visit the official Wolfram Language Reference for more details.