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92 lines
3.3 KiB
HTML
92 lines
3.3 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>asinh (LIBM)</title>
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<meta name="description" content="asinh (LIBM)">
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<meta name="keywords" content="asinh (LIBM)">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
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<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Math.html#Math" rel="up" title="Math">
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<link href="atan.html#atan" rel="next" title="atan">
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</head>
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<body lang="en">
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<a name="asinh"></a>
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<div class="header">
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<p>
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Next: <a href="atan.html#atan" accesskey="n" rel="next">atan</a>, Previous: <a href="asin.html#asin" accesskey="p" rel="prev">asin</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="asinh_002c-asinhf_002d_002d_002dinverse-hyperbolic-sine"></a>
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<h3 class="section">1.6 <code>asinh</code>, <code>asinhf</code>—inverse hyperbolic sine</h3>
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<a name="index-asinh"></a>
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<a name="index-asinhf"></a>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <math.h>
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double asinh(double <var>x</var>);
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float asinhf(float <var>x</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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<code>asinh</code> calculates the inverse hyperbolic sine of <var>x</var>.
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<code>asinh</code> is defined as
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</p><div class="smallexample">
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<pre class="smallexample"> sgn(<var>x</var>) * log(abs(<var>x</var>) + sqrt(1+<var>x</var>*<var>x</var>))
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</pre></div>
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<p><code>asinhf</code> is identical, other than taking and returning floats.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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<code>asinh</code> and <code>asinhf</code> return the calculated value.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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Neither <code>asinh</code> nor <code>asinhf</code> are ANSI C.
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</p>
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<br>
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</body>
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</html>
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