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<a name="sinh_002c-sinhf_002d_002d_002dhyperbolic-sine"></a>
<h3 class="section">1.53 <code>sinh</code>, <code>sinhf</code>—hyperbolic sine</h3>
<a name="index-sinh"></a>
<a name="index-sinhf"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include <math.h>
double sinh(double <var>x</var>);
float sinhf(float <var>x</var>);
</pre></div>
<p><strong>Description</strong><br>
<code>sinh</code> computes the hyperbolic sine of the argument <var>x</var>.
Angles are specified in radians. <code>sinh</code>(<var>x</var>) is defined as
</p><div class="smallexample">
<pre class="smallexample"> (exp(<var>x</var>) - exp(-<var>x</var>))/2
</pre></div>
<p><code>sinhf</code> is identical, save that it takes and returns <code>float</code> values.
</p>
<br>
<p><strong>Returns</strong><br>
The hyperbolic sine of <var>x</var> is returned.
</p>
<p>When the correct result is too large to be representable (an
overflow), <code>sinh</code> returns <code>HUGE_VAL</code> with the
appropriate sign, and sets the global value <code>errno</code> to
<code>ERANGE</code>.
</p>
<p>You can modify error handling for these functions with <code>matherr</code>.
</p>
<br>
<p><strong>Portability</strong><br>
<code>sinh</code> is ANSI C.
<code>sinhf</code> is an extension.
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