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### 9.7 ACOSD — Arccosine function, degrees

Description:

ACOSD(X) computes the arccosine of X in degrees (inverse of COSD(X)).

This function is for compatibility only and should be avoided in favor of standard constructs wherever possible.

Standard:

GNU Extension, enabled with -fdec-math

Class:

Elemental function

Syntax:

RESULT = ACOSD(X)

Arguments:
 X The type shall either be REAL with a magnitude that is less than or equal to one - or the type shall be COMPLEX.
Return value:

The return value is of the same type and kind as X. The real part of the result is in degrees and lies in the range 0 \leq \Re \acos(x) \leq 180.

Example:
program test_acosd
real(8) :: x = 0.866_8
x = acosd(x)
end program test_acosd

Specific names:
 Name Argument Return type Standard ACOSD(X) REAL(4) X REAL(4) GNU Extension DACOSD(X) REAL(8) X REAL(8) GNU Extension