COS — Cosine function#

COS(X)#

COS(X) computes the cosine of X.

Parameters:: X – The type shall be REAL or COMPLEX.
Returns:: 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.

Standard:

Fortran 77 and later, has overloads that are GNU extensions

Class:

Elemental function

Syntax:

RESULT = COS(X)

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

See also:

Inverse function: ACOS Degrees function: COSD