COS — Cosine function

Description

COS(X) computes the cosine of X.

Syntax

RESULT = COS(X)

Arguments

X The type shall be REAL or COMPLEX.

Return value

The return value is of the same type and kind as X. The real part of the result is in radians. If X is of the type REAL, the return value lies in the range -1 \leq \cos (x) \leq 1.

Example



program test_cos

  real :: x = 0.0

  x = cos(x)

end program test_cos

Specific names

Name Argument Return type Standard
COS(X) REAL(4) X REAL(4) Fortran 77 and later
DCOS(X) REAL(8) X REAL(8) Fortran 77 and later
CCOS(X) COMPLEX(4) X COMPLEX(4) Fortran 77 and later
ZCOS(X) COMPLEX(8) X COMPLEX(8) GNU extension
CDCOS(X) COMPLEX(8) X COMPLEX(8) GNU extension

Standard

Fortran 77 and later, has overloads that are GNU extensions

Class

Elemental function

Name	Argument	Return type	Standard
`COS(X)`	`REAL(4) X`	`REAL(4)`	Fortran 77 and later
`DCOS(X)`	`REAL(8) X`	`REAL(8)`	Fortran 77 and later
`CCOS(X)`	`COMPLEX(4) X`	`COMPLEX(4)`	Fortran 77 and later
`ZCOS(X)`	`COMPLEX(8) X`	`COMPLEX(8)`	GNU extension
`CDCOS(X)`	`COMPLEX(8) X`	`COMPLEX(8)`	GNU extension