atan(403/396) atan(1053/396) atan(675/900) atan(1925/900) atan(2107/276) atan(493/276)

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.