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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:

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 — Tangent function Degrees function: COTAND — Cotangent function, degrees