title: Javascript sin function issue
body: <p>I have a problem with <code>Math.sin</code>. I thought it would output the sinus of the given integer. So I tried <code>Math.sin(30)</code> and my output was <a href="http://jsfiddle.net/eqgbY/" rel="nofollow"><code>-0.9880316240928618</code></a> and then I checked with my calculator and it was 0.5.</p>