mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/*
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Copyright (C) 2012 Fredrik Johansson
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This file is part of Arb.
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Arb is free software: you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version. See <http://www.gnu.org/licenses/>.
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*/
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#include "acb.h"
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void
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acb_cos(acb_t r, const acb_t z, slong prec)
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{
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#define a acb_realref(z)
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#define b acb_imagref(z)
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if (arb_is_zero(b))
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{
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arb_cos(acb_realref(r), a, prec);
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arb_zero(acb_imagref(r));
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}
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else if (arb_is_zero(a))
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{
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arb_cosh(acb_realref(r), b, prec);
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arb_zero(acb_imagref(r));
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}
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else
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{
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arb_t sa, ca, sb, cb;
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arb_init(sa);
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arb_init(ca);
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arb_init(sb);
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arb_init(cb);
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arb_sin_cos(sa, ca, a, prec);
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arb_sinh_cosh(sb, cb, b, prec);
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arb_mul(acb_realref(r), ca, cb, prec);
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arb_mul(acb_imagref(r), sa, sb, prec);
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arb_neg(acb_imagref(r), acb_imagref(r));
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arb_clear(sa);
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arb_clear(ca);
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arb_clear(sb);
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arb_clear(cb);
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}
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#undef a
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#undef b
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}
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