1 /* $OpenBSD: s_casinh.c,v 1.7 2016/09/12 19:47:02 guenther Exp $ */ 2 /* 3 * Copyright (c) 2008 Stephen L. Moshier <steve@moshier.net> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 /* casinh 19 * 20 * Complex inverse hyperbolic sine 21 * 22 * 23 * 24 * SYNOPSIS: 25 * 26 * double complex casinh(); 27 * double complex z, w; 28 * 29 * w = casinh (z); 30 * 31 * 32 * 33 * DESCRIPTION: 34 * 35 * casinh z = -i casin iz . 36 * 37 * ACCURACY: 38 * 39 * Relative error: 40 * arithmetic domain # trials peak rms 41 * IEEE -10,+10 30000 1.8e-14 2.6e-15 42 * 43 */ 44 45 #include <complex.h> 46 #include <float.h> 47 #include <math.h> 48 49 double complex 50 casinh(double complex z) 51 { 52 double complex w; 53 54 w = -1.0 * I * casin (z * I); 55 return (w); 56 } 57 DEF_STD(casinh); 58 LDBL_MAYBE_UNUSED_CLONE(casinh); 59