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/GNU Fortran 7

9.73 COS — Cosine function

Description:

COS(X) computes the cosine of X.

Standard:

Fortran 77 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 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
See also:

Inverse function: ACOS Degrees function: COSD

© Free Software Foundation
Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gfortran/COS.html