Trailing-Edge
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PDP-10 Archives
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SRI_NIC_PERM_FS_1_19910112
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c/lib5/pml/complex/csin.c
There are no other files named csin.c in the archive.
/*
* +++ NAME +++
*
* CSIN Complex double precision sine
*
* +++ INDEX +++
*
* CSIN
* complex functions
* machine independent routines
* math libraries
*
* +++ DESCRIPTION +++
*
* Computes double precision complex sine of
* a double precision complex argument.
* The result replaces the argument.
*
* +++ USAGE +++
*
* csin(z)
* COMPLEX *z;
*
* +++ REFERENCES +++
*
* Fortran 77 user's guide, Digital Equipment Corp. pp B-12
*
* +++ RESTRICTIONS +++
*
*
* +++ PROGRAMMER +++
*
* Fred Fish
* Goodyear Aerospace Corp, Arizona Div.
* (602) 932-7000 work
* (602) 894-6881 home
*
* +++ INTERNALS +++
*
* Computes complex sine of Z = x + j y from:
*
* 1. R_CSIN = DSIN(x) * DCOSH(y)
*
* 2. I_CSIN = DCOS(x) * DSINH(y)
*
* Then CSIN(z) = R_CSIN + j I_CSIN
*
* ---
*/
/*)LIBRARY
*/
#include <stdio.h>
#include "c:pmluse.h"
#include "pml.h"
csin(z)
register COMPLEX *z;
{
double r_csin, i_csin, dsin(), dcos(), dsinh(), dcosh();
r_csin = dsin(z->real) * dcosh(z->imag);
i_csin = dcos(z->real) * dsinh(z->imag);
z->real = r_csin;
z->imag = i_csin;
}