-pi/2</code> and <code class="code">pi/2</code>.<br>
</div>

<pre><span id="VALatan"><span class="keyword">val</span> atan</span> : <code class="type">float -&gt; float</code></pre><div class="info ">
Arc tangent.
    Result is in radians and is between <code class="code">-pi/2</code> and <code class="code">pi/2</code>.<br>
</div>

<pre><span id="VALatan2"><span class="keyword">val</span> atan2</span> : <code class="type">float -&gt; float -&gt; float</code></pre><div class="info ">
<code class="code">atan2