6.45 COS — Cosine function

Description:

COS(X) computes the cosine of X.

Standard:

F77 and later, has overloads that are GNU extensions

Class:

Elemental function

Syntax:

RESULT = COS(X)

Arguments:

X	The type shall be REAL(*) or COMPLEX(*).

Return value:

The return value is of type REAL(*) and it lies in the range -1 \leq \cos (x) \leq 1. The kind type parameter is the same as X.

Example:

          program test_cos
            real :: x = 0.0
            x = cos(x)
          end program test_cos
     

Specific names:

Name	Argument	Return type	Standard
DCOS(X)	REAL(8) X	REAL(8)	F77 and later
CCOS(X)	COMPLEX(4) X	COMPLEX(4)	F77 and later
ZCOS(X)	COMPLEX(8) X	COMPLEX(8)	GNU extension
CDCOS(X)	COMPLEX(8) X	COMPLEX(8)	GNU extension

See also:

Inverse function: ACOS