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92 lines
3.4 KiB
HTML
92 lines
3.4 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>catan (LIBM)</title>
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<meta name="description" content="catan (LIBM)">
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<meta name="keywords" content="catan (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="Complex.html#Complex" rel="up" title="Complex">
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<link href="catanh.html#catanh" rel="next" title="catanh">
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</head>
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<body lang="en">
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<a name="catan"></a>
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<div class="header">
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<p>
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Next: <a href="catanh.html#catanh" accesskey="n" rel="next">catanh</a>, Previous: <a href="casinh.html#casinh" accesskey="p" rel="prev">casinh</a>, Up: <a href="Complex.html#Complex" accesskey="u" rel="up">Complex</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="catan_002c-catanf_002d_002d_002dcomplex-arc-tangent"></a>
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<h3 class="section">2.7 <code>catan</code>, <code>catanf</code>—complex arc tangent</h3>
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<a name="index-catan"></a>
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<a name="index-catanf"></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 <complex.h>
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double complex catan(double complex <var>z</var>);
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float complex catanf(float complex <var>z</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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These functions compute the complex arc tangent of <var>z</var>,
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with branch cuts outside the interval [-i, +i] along the
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imaginary axis.
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</p>
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<p><code>catanf</code> is identical to <code>catan</code>, except that it performs
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its calculations on <code>floats complex</code>.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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These functions return the complex arc tangent value, in the range
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of a strip mathematically unbounded along the imaginary axis
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and in the interval [-pi/2, +pi/2] along the real axis.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>catan</code> and <code>catanf</code> are ISO C99
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</p>
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<br>
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