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+<head>
+<title>The GNU Fortran Compiler: COS</title>
+
+<meta name="description" content="The GNU Fortran Compiler: COS">
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+<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
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+<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
+<a name="COS"></a>
+<div class="header">
+<p>
+Next: <a href="COSD.html#COSD" accesskey="n" rel="next">COSD</a>, Previous: <a href="CONJG.html#CONJG" accesskey="p" rel="previous">CONJG</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="COS-_002d_002d_002d-Cosine-function"></a>
+<h3 class="section">8.73 <code>COS</code> &mdash; Cosine function</h3>
+<a name="index-COS"></a>
+<a name="index-DCOS"></a>
+<a name="index-CCOS"></a>
+<a name="index-ZCOS"></a>
+<a name="index-CDCOS"></a>
+<a name="index-trigonometric-function_002c-cosine"></a>
+<a name="index-cosine"></a>
+
+<dl compact="compact">
+<dt><em>Description</em>:</dt>
+<dd><p><code>COS(X)</code> computes the cosine of <var>X</var>.
+</p>
+</dd>
+<dt><em>Standard</em>:</dt>
+<dd><p>Fortran 77 and later, has overloads that are GNU extensions
+</p>
+</dd>
+<dt><em>Class</em>:</dt>
+<dd><p>Elemental function
+</p>
+</dd>
+<dt><em>Syntax</em>:</dt>
+<dd><p><code>RESULT = COS(X)</code>
+</p>
+</dd>
+<dt><em>Arguments</em>:</dt>
+<dd><table>
+<tr><td width="15%"><var>X</var></td><td width="70%">The type shall be <code>REAL</code> or
+<code>COMPLEX</code>.</td></tr>
+</table>
+
+</dd>
+<dt><em>Return value</em>:</dt>
+<dd><p>The return value is of the same type and kind as <var>X</var>. The real part
+of the result is in radians. If <var>X</var> is of the type <code>REAL</code>,
+the return value lies in the range <em>-1 \leq \cos (x) \leq 1</em>.
+</p>
+</dd>
+<dt><em>Example</em>:</dt>
+<dd><div class="smallexample">
+<pre class="smallexample">program test_cos
+  real :: x = 0.0
+  x = cos(x)
+end program test_cos
+</pre></div>
+
+</dd>
+<dt><em>Specific names</em>:</dt>
+<dd><table>
+<thead><tr><th width="20%">Name</th><th width="23%">Argument</th><th width="20%">Return type</th><th width="33%">Standard</th></tr></thead>
+<tr><td width="20%"><code>COS(X)</code></td><td width="23%"><code>REAL(4) X</code></td><td width="20%"><code>REAL(4)</code></td><td width="33%">Fortran 77 and later</td></tr>
+<tr><td width="20%"><code>DCOS(X)</code></td><td width="23%"><code>REAL(8) X</code></td><td width="20%"><code>REAL(8)</code></td><td width="33%">Fortran 77 and later</td></tr>
+<tr><td width="20%"><code>CCOS(X)</code></td><td width="23%"><code>COMPLEX(4) X</code></td><td width="20%"><code>COMPLEX(4)</code></td><td width="33%">Fortran 77 and later</td></tr>
+<tr><td width="20%"><code>ZCOS(X)</code></td><td width="23%"><code>COMPLEX(8) X</code></td><td width="20%"><code>COMPLEX(8)</code></td><td width="33%">GNU extension</td></tr>
+<tr><td width="20%"><code>CDCOS(X)</code></td><td width="23%"><code>COMPLEX(8) X</code></td><td width="20%"><code>COMPLEX(8)</code></td><td width="33%">GNU extension</td></tr>
+</table>
+
+</dd>
+<dt><em>See also</em>:</dt>
+<dd><p>Inverse function: <br>
+<a href="ACOS.html#ACOS">ACOS</a> <br>
+Degrees function: <br>
+<a href="COSD.html#COSD">COSD</a>
+</p></dd>
+</dl>
+
+
+
+
+
+
+</body>
+</html>