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Power 6/32 Unix version 1.2b

#include "complex"

z_cos(r, z)
dcomplex *r, *z;
{
double sin(), cos(), sinh(), cosh();

r->dreal = cos(z->dreal) * cosh(z->dimag);
r->dimag = - sin(z->dreal) * sinh(z->dimag);
}

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