/*	$OpenBSD: s_ctanh.c,v 1.7 2016/09/12 19:47:02 guenther Exp $	*/

/*

 * Copyright (c) 2008 Stephen L. Moshier <steve@moshier.net>

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 */

/*							ctanh

 *

 *	Complex hyperbolic tangent

 *

 *

 *

 * SYNOPSIS:

 *

 * double complex ctanh();

 * double complex z, w;

 *

 * w = ctanh (z);

 *

 *

 *

 * DESCRIPTION:

 *

 * tanh z = (sinh 2x  +  i sin 2y) / (cosh 2x + cos 2y) .

 *

 * ACCURACY:

 *

 *                      Relative error:

 * arithmetic   domain     # trials      peak         rms

 *    IEEE      -10,+10     30000       1.7e-14     2.4e-16

 *

 */

#include <complex.h>

#include <float.h>

#include <math.h>

double complex

ctanh(double complex z)

{

	double complex w;

	double x, y, d;

	x = creal(z);

	y = cimag(z);

	return (w);

}

DEF_STD(ctanh);

LDBL_MAYBE_UNUSED_CLONE(ctanh);