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94 lines
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<a name="sin"></a>
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<div class="header">
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<p>
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Next: <a href="sinh.html#sinh" accesskey="n" rel="next">sinh</a>, Previous: <a href="signbit.html#signbit" accesskey="p" rel="prev">signbit</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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<a name="sin_002c-sinf_002c-cos_002c-cosf_002d_002d_002dsine-or-cosine"></a>
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<h3 class="section">1.53 <code>sin</code>, <code>sinf</code>, <code>cos</code>, <code>cosf</code>—sine or cosine</h3>
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<a name="index-sin"></a>
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<a name="index-sinf"></a>
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<a name="index-cos"></a>
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<a name="index-cosf"></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 sin(double <var>x</var>);
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float sinf(float <var>x</var>);
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double cos(double <var>x</var>);
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float cosf(float <var>x</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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<code>sin</code> and <code>cos</code> compute (respectively) the sine and cosine
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of the argument <var>x</var>. Angles are specified in radians.
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</p>
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<p><code>sinf</code> and <code>cosf</code> are identical, save that they take and
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return <code>float</code> values.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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The sine or cosine of <var>x</var> is returned.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>sin</code> and <code>cos</code> are ANSI C.
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<code>sinf</code> and <code>cosf</code> are extensions.
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