Fortran Wiki
acosh (changes)

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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 \\mathop{Im}{\\acosh(x)} \\leq \\pi$0 \leq \mathop{Im}{\acosh(x)} \leq \pi$.

Example

program test_acosh
  real(8), dimension(3) :: x = (/ 1.0, 2.0, 3.0 /)
  write (*,*) acosh(x)
end program

See also

Inverse function: cosh