Fortran Wiki
acos

Description

acos(x) computes the arccosine of x (inverse of cos(x)).

Standard

FORTRAN 77 and later, for a complex argument Fortran 2008 and later

Class

Elemental function

Styntax

result = acos(x)

Arguments

• x - The type shall be real with a magnitude that is less than one.

Return value

The return value is of the same type and kind as x. The real part of the result is in radians and lies in the range $0 \leq \acos(x) \leq \pi$.

Example

program test_acos
  real(8) :: x = 0.866_8
  x = acos(x)
end program test_acos

See also

Inverse function: cos