# casin.f

          COMPLEX FUNCTION CASIN (ZINP)
    C***BEGIN PROLOGUE  CASIN
    C***PURPOSE  Compute the complex arc sine.
    C***LIBRARY   SLATEC (FNLIB)
    C***CATEGORY  C4A
    C***TYPE      COMPLEX (CASIN-C)
    C***KEYWORDS  ARC SINE, ELEMENTARY FUNCTIONS, FNLIB, TRIGONOMETRIC
    C***AUTHOR  Fullerton, W., (LANL)
    C***DESCRIPTION
    C
    C CASIN(ZINP) calculates the complex trigonometric arc sine of ZINP.
    C The result is in units of radians, and the real part is in the first
    C or fourth quadrant.
    C
    C***REFERENCES  (NONE)
    C***ROUTINES CALLED  R1MACH
    C***REVISION HISTORY  (YYMMDD)
    C   770701  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***END PROLOGUE  CASIN