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/GNU Fortran 7

9.76 COTAN — Cotangent function

Description:

COTAN(X) computes the cotangent of X. Equivalent to COS(x) divided by SIN(x), or 1 / TAN(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 = COTAN(X)

Arguments:
X The type shall be REAL or COMPLEX.
Return value:

The return value has same type and kind as X, and its value is in radians.

Example:
program test_cotan
  real(8) :: x = 0.165_8
  x = cotan(x)
end program test_cotan
Specific names:
Name Argument Return type Standard
COTAN(X) REAL(4) X REAL(4) GNU Extension
DCOTAN(X) REAL(8) X REAL(8) GNU Extension
See also:

Converse function: TAN Degrees function: COTAND

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