title: Make Swift Assume Degrees for Trigonometry Calculations
body: <p>Is it possible to change a setting, property, etc in Swift for iOS so that it assumes degrees for trigonometry calculations rather than radians?</p>
  
  <p>For example <code>sin(90)</code> would be evaluated to <code>1</code>.</p>
  
  <p>I have:</p>
  
  <pre><code>let pi = 3.14 
  var r2d = 180.0/pi
  var d2r = pi/180
  </code></pre>
  
  <p>... but the conversions are getting really involved for some of the long trig equations.</p>