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<a name="sin_002c-sinf_002c-cos_002c-cosf_002d_002d_002dsine-or-cosine"></a>
<h3 class="section">1.53 <code>sin</code>, <code>sinf</code>, <code>cos</code>, <code>cosf</code>&mdash;sine or cosine</h3>
<a name="index-sin"></a>
<a name="index-sinf"></a>
<a name="index-cos"></a>
<a name="index-cosf"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;math.h&gt;
double sin(double <var>x</var>);
float  sinf(float <var>x</var>);
double cos(double <var>x</var>);
float cosf(float <var>x</var>);

</pre></div>
<p><strong>Description</strong><br>
<code>sin</code> and <code>cos</code> compute (respectively) the sine and cosine
of the argument <var>x</var>.  Angles are specified in radians. 
</p>
<p><code>sinf</code> and <code>cosf</code> are identical, save that they take and
return <code>float</code> values. 
</p>
<br>
<p><strong>Returns</strong><br>
The sine or cosine of <var>x</var> is returned.
</p>
<br>
<p><strong>Portability</strong><br>
<code>sin</code> and <code>cos</code> are ANSI C. 
<code>sinf</code> and <code>cosf</code> are extensions.
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