1 /* Return cosine of complex float value. 2 Copyright (C) 1997 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, write to the Free 18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 19 02111-1307 USA. */ 20 21 #include <complex.h> 22 #include <math.h> 23 24 __complex__ float 25 __cacosf (__complex__ float x) 26 { 27 __complex__ float y; 28 __complex__ float res; 29 30 y = __casinf (x); 31 32 __real__ res = (float) M_PI_2 - __real__ y; 33 __imag__ res = -__imag__ y; 34 35 return res; 36 } 37 #ifndef __cacosf 38 weak_alias (__cacosf, cacosf) 39 #endif 40