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13 lines
207 B
C
13 lines
207 B
C
/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
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#include <math.h>
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/*
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* @implemented
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*/
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double cosh(double x)
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{
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const double ebig = exp(fabs(x));
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return (ebig + 1.0/ebig) / 2.0;
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}
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