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e_cosh.c (141296) e_cosh.c (176451)
1
2/* @(#)e_cosh.c 1.3 95/01/18 */
3/*
4 * ====================================================
5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 *
7 * Developed at SunSoft, a Sun Microsystems, Inc. business.
8 * Permission to use, copy, modify, and distribute this
9 * software is freely granted, provided that this notice
10 * is preserved.
11 * ====================================================
12 */
13
1
2/* @(#)e_cosh.c 1.3 95/01/18 */
3/*
4 * ====================================================
5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 *
7 * Developed at SunSoft, a Sun Microsystems, Inc. business.
8 * Permission to use, copy, modify, and distribute this
9 * software is freely granted, provided that this notice
10 * is preserved.
11 * ====================================================
12 */
13
14#ifndef lint
15static char rcsid[] = "$FreeBSD: head/lib/msun/src/e_cosh.c 141296 2005-02-04 18:26:06Z das $";
16#endif
14#include <sys/cdefs.h>
15__FBSDID("$FreeBSD: head/lib/msun/src/e_cosh.c 176451 2008-02-22 02:30:36Z das $");
17
18/* __ieee754_cosh(x)
19 * Method :
20 * mathematically cosh(x) if defined to be (exp(x)+exp(-x))/2
21 * 1. Replace x by |x| (cosh(x) = cosh(-x)).
22 * 2.
23 * [ exp(x) - 1 ]^2
24 * 0 <= x <= ln2/2 : cosh(x) := 1 + -------------------

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17/* __ieee754_cosh(x)
18 * Method :
19 * mathematically cosh(x) if defined to be (exp(x)+exp(-x))/2
20 * 1. Replace x by |x| (cosh(x) = cosh(-x)).
21 * 2.
22 * [ exp(x) - 1 ]^2
23 * 0 <= x <= ln2/2 : cosh(x) := 1 + -------------------

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