Can I write `sin(whatever)`?
<p>Can i write <code>sin(whatever)</code> in Java and have it work?</p>

<pre><code>public static void main(String[] args) {
    try {
        double check = Double.parseDouble(args[0]);
    } catch (NumberFormatException e) {
        System.exit(0);
    }
    sin(args[0]);
}
</code></pre>
