1*8fa80f29Smrg /* mpc_cosh -- hyperbolic cosine of a complex number.
2*8fa80f29Smrg
3*8fa80f29Smrg Copyright (C) 2008, 2009, 2011 INRIA
4*8fa80f29Smrg
5*8fa80f29Smrg This file is part of GNU MPC.
6*8fa80f29Smrg
7*8fa80f29Smrg GNU MPC is free software; you can redistribute it and/or modify it under
8*8fa80f29Smrg the terms of the GNU Lesser General Public License as published by the
9*8fa80f29Smrg Free Software Foundation; either version 3 of the License, or (at your
10*8fa80f29Smrg option) any later version.
11*8fa80f29Smrg
12*8fa80f29Smrg GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY
13*8fa80f29Smrg WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14*8fa80f29Smrg FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
15*8fa80f29Smrg more details.
16*8fa80f29Smrg
17*8fa80f29Smrg You should have received a copy of the GNU Lesser General Public License
18*8fa80f29Smrg along with this program. If not, see http://www.gnu.org/licenses/ .
19*8fa80f29Smrg */
20*8fa80f29Smrg
21*8fa80f29Smrg #include "mpc-impl.h"
22*8fa80f29Smrg
23*8fa80f29Smrg int
mpc_cosh(mpc_ptr rop,mpc_srcptr op,mpc_rnd_t rnd)24*8fa80f29Smrg mpc_cosh (mpc_ptr rop, mpc_srcptr op, mpc_rnd_t rnd)
25*8fa80f29Smrg {
26*8fa80f29Smrg /* cosh(op) = cos(i*op) */
27*8fa80f29Smrg mpc_t z;
28*8fa80f29Smrg
29*8fa80f29Smrg /* z = i*op without copying significand */
30*8fa80f29Smrg mpc_realref (z)[0] = mpc_imagref (op)[0];
31*8fa80f29Smrg mpc_imagref (z)[0] = mpc_realref (op)[0];
32*8fa80f29Smrg MPFR_CHANGE_SIGN (mpc_realref (z));
33*8fa80f29Smrg
34*8fa80f29Smrg return mpc_cos (rop, z, rnd);
35*8fa80f29Smrg }
36