SLATEC Routines --- DCOT ---

*DECK DCOT
      DOUBLE PRECISION FUNCTION DCOT (X)
C***BEGIN PROLOGUE  DCOT
C***PURPOSE  Compute the cotangent.
C***LIBRARY   SLATEC (FNLIB)
C***CATEGORY  C4A
C***TYPE      DOUBLE PRECISION (COT-S, DCOT-D, CCOT-C)
C***KEYWORDS  COTANGENT, ELEMENTARY FUNCTIONS, FNLIB, TRIGONOMETRIC
C***AUTHOR  Fullerton, W., (LANL)
C***DESCRIPTION
C
C DCOT(X) calculates the double precision trigonometric cotangent
C for double precision argument X.  X is in units of radians.
C
C Series for COT        on the interval  0.          to  6.25000E-02
C                                        with weighted error   5.52E-34
C                                         log weighted error  33.26
C                               significant figures required  32.34
C                                    decimal places required  33.85
C
C***REFERENCES  (NONE)
C***ROUTINES CALLED  D1MACH, DCSEVL, INITDS, XERMSG
C***REVISION HISTORY  (YYMMDD)
C   770601  DATE WRITTEN
C   890531  Changed all specific intrinsics to generic.  (WRB)
C   890531  REVISION DATE from Version 3.2
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900315  CALLs to XERROR changed to CALLs to XERMSG.  (THJ)
C   920618  Removed space from variable names.  (RWC, WRB)
C***END PROLOGUE  DCOT