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view liboctave/cruft/amos/zshch.f @ 16659:608e307b4914 ss-3-7-5

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snapshot 3.7.5 * configure.ac (OCTAVE_VERSION): Bump to 3.7.5.
author John W. Eaton <jwe@octave.org>
date Tue, 14 May 2013 05:23:45 -0400
parents 648dabbb4c6b
children
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      SUBROUTINE ZSHCH(ZR, ZI, CSHR, CSHI, CCHR, CCHI)
C***BEGIN PROLOGUE  ZSHCH
C***REFER TO  ZBESK,ZBESH
C
C     ZSHCH COMPUTES THE COMPLEX HYPERBOLIC FUNCTIONS CSH=SINH(X+I*Y)
C     AND CCH=COSH(X+I*Y), WHERE I**2=-1.
C
C***ROUTINES CALLED  (NONE)
C***END PROLOGUE  ZSHCH
C
      DOUBLE PRECISION CCHI, CCHR, CH, CN, CSHI, CSHR, SH, SN, ZI, ZR,
     * DCOSH, DSINH
      SH = DSINH(ZR)
      CH = DCOSH(ZR)
      SN = DSIN(ZI)
      CN = DCOS(ZI)
      CSHR = SH*CN
      CSHI = CH*SN
      CCHR = CH*CN
      CCHI = SH*SN
      RETURN
      END