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+<title>The GNU Fortran Compiler: COSH</title>
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+<a name="COSH"></a>
+<div class="header">
+<p>
+Next: <a href="COTAN.html#COTAN" accesskey="n" rel="next">COTAN</a>, Previous: <a href="COSD.html#COSD" accesskey="p" rel="previous">COSD</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="COSH-_002d_002d_002d-Hyperbolic-cosine-function"></a>
+<h3 class="section">8.75 <code>COSH</code> &mdash; Hyperbolic cosine function</h3>
+<a name="index-COSH"></a>
+<a name="index-DCOSH"></a>
+<a name="index-hyperbolic-cosine"></a>
+<a name="index-hyperbolic-function_002c-cosine"></a>
+<a name="index-cosine_002c-hyperbolic"></a>
+
+<dl compact="compact">
+<dt><em>Description</em>:</dt>
+<dd><p><code>COSH(X)</code> computes the hyperbolic cosine of <var>X</var>.
+</p>
+</dd>
+<dt><em>Standard</em>:</dt>
+<dd><p>Fortran 77 and later, for a complex argument Fortran 2008 or later
+</p>
+</dd>
+<dt><em>Class</em>:</dt>
+<dd><p>Elemental function
+</p>
+</dd>
+<dt><em>Syntax</em>:</dt>
+<dd><p><code>X = COSH(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 has same type and kind as <var>X</var>. If <var>X</var> is
+complex, the imaginary part of the result is in radians. If <var>X</var>
+is <code>REAL</code>, the return value has a lower bound of one,
+<em>\cosh (x) \geq 1</em>.
+</p>
+</dd>
+<dt><em>Example</em>:</dt>
+<dd><div class="smallexample">
+<pre class="smallexample">program test_cosh
+  real(8) :: x = 1.0_8
+  x = cosh(x)
+end program test_cosh
+</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>COSH(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>DCOSH(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>
+</table>
+
+</dd>
+<dt><em>See also</em>:</dt>
+<dd><p>Inverse function: <br>
+<a href="ACOSH.html#ACOSH">ACOSH</a>
+</p></dd>
+</dl>
+
+
+
+
+
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