Lahey/GNU Fortran

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8.7 ACOSH — Inverse hyperbolic cosine function

Description:
ACOSH(X) computes the inverse hyperbolic cosine of X.
Standard:
Fortran 2008 and later
Class:
Elemental function
Syntax:
RESULT = ACOSH(X)
Arguments:

X The type shall be REAL or COMPLEX.

Return value:
The return value has the same type and kind as X. If X is complex, the imaginary part of the result is in radians and lies between 0 \leq \Im \acosh(x) \leq \pi.
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