ACOSH

Returns a DOUBLE PRECISION value that represents the inverse (arc) hyperbolic cosine of the function argument.

Returns a DOUBLE PRECISION value that represents the inverse (arc) hyperbolic cosine of the function argument.

Behavior type

Immutable

Syntax

ACOSH ( expression )

Arguments

expression
Resolves to a value of type INTEGER or DOUBLE PRECISION ≥ 1.0, otherwise returns NaN.

Examples

=> SELECT acosh(4);
      acosh
------------------
 2.06343706889556
(1 row)