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BSD 4.2

/*
 *	"@(#)c_cos.c	1.1"
 */

#include "complex"

c_cos(r, z)
complex *r, *z;
{
double sin(), cos(), sinh(), cosh();

r->real = cos(z->real) * cosh(z->imag);
r->imag = - sin(z->real) * sinh(z->imag);
}

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