6.7 ACOSH — Hyperbolic arccosine function

Description:

ACOSH(X) computes the hyperbolic arccosine of X (inverse of COSH(X)).

Standard:

GNU extension

Class:

Elemental function

Syntax:

RESULT = ACOSH(X)

Arguments:

X	The type shall be REAL(*) with a magnitude that is greater or equal to one.

Return value:

The return value is of type REAL(*) and it lies in the range 0 \leq \acosh (x) \leq \infty.

Example:

          PROGRAM test_acosh
            REAL(8), DIMENSION(3) :: x = (/ 1.0, 2.0, 3.0 /)
            WRITE (*,*) ACOSH(x)
          END PROGRAM
     

Specific names:

Name	Argument	Return type	Standard
DACOSH(X)	REAL(8) X	REAL(8)	GNU extension

See also:

Inverse function: COSH