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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:
XThe 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:
NameArgumentReturn typeStandard
COTAN(X)REAL(4) XREAL(4)GNU Extension
DCOTAN(X)REAL(8) XREAL(8)GNU Extension
See also:

Converse function: TAN Degrees function: COTAND