Mercurial > octave-nkf
view libcruft/amos/zshch.f @ 6469:a848b846cb3a ss-2-9-10
[project @ 2007-03-27 18:42:11 by jwe]
author | jwe |
---|---|
date | Tue, 27 Mar 2007 18:42:11 +0000 |
parents | 8b0cb8f79fdc |
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