dcot.f
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