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8.7 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

See also:

Inverse function:
COSD — Cosine function, degrees
Radians function:
ACOS — Arccosine function