1/* mpc_cosh -- hyperbolic cosine of a complex number. 2 3Copyright (C) 2008, 2009, 2011 INRIA 4 5This file is part of GNU MPC. 6 7GNU MPC is free software; you can redistribute it and/or modify it under 8the terms of the GNU Lesser General Public License as published by the 9Free Software Foundation; either version 3 of the License, or (at your 10option) any later version. 11 12GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 14FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for 15more details. 16 17You should have received a copy of the GNU Lesser General Public License 18along with this program. If not, see http://www.gnu.org/licenses/ . 19*/ 20 21#include "mpc-impl.h" 22 23int 24mpc_cosh (mpc_ptr rop, mpc_srcptr op, mpc_rnd_t rnd) 25{ 26 /* cosh(op) = cos(i*op) */ 27 mpc_t z; 28 29 /* z = i*op without copying significand */ 30 mpc_realref (z)[0] = mpc_imagref (op)[0]; 31 mpc_imagref (z)[0] = mpc_realref (op)[0]; 32 MPFR_CHANGE_SIGN (mpc_realref (z)); 33 34 return mpc_cos (rop, z, rnd); 35} 36