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/GNU Fortran 7

9.8 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

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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gfortran/ACOSH.html