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<a name="ccos_002c-ccosf_002d_002d_002dcomplex-cosine"></a>
<h3 class="section">2.9 <code>ccos</code>, <code>ccosf</code>&mdash;complex cosine</h3>
<a name="index-ccos"></a>
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<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;complex.h&gt;
double complex ccos(double complex <var>z</var>);
float complex ccosf(float complex <var>z</var>);

</pre></div>
<p><strong>Description</strong><br>
These functions compute the complex cosine of <var>z</var>.
</p>
<p><code>ccosf</code> is identical to <code>ccos</code>, except that it performs
its calculations on <code>floats complex</code>.
</p>
<br>
<p><strong>Returns</strong><br>
These functions return the complex cosine value.
</p>
<br>
<p><strong>Portability</strong><br>
<code>ccos</code> and <code>ccosf</code> are ISO C99
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