title: numpy.sin function in degrees?
body: <p>I'm working on a problem that has to do with calculating angles of refraction and what not. However, it seems that I'm unable to use the numpy.sin() function in degrees. I have tried to use numpy.degrees() and numpy.rad2deg().</p>
  
  <pre><code>numpy.sin(90)
  
  numpy.degrees(numpy.sin(90))
  </code></pre>
  
  <p>Both return ~ 0.894 and ~ 51.2 respectively.</p>
  
  <p>Thanks for your help.</p>