ccos

Complex circular cosine.

SYNOPSIS:

void ccos();
cmplx z, w;

ccos(&z, &w);

DESCRIPTION:

If
z = x + iy,

then

w = cos x cosh y - i sin x sinh y.

ACCURACY:

Relative error:
arithmetic domain # trials peak rms
DEC -10,+10 8400 4.5e-17 1.3e-17
IEEE -10,+10 30000 3.8e-16 1.0e-16