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8.76 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