SOLUTION: Find the reference angle for 11pi/6

Here is an easy way to find the reference angle when the angle is 
of the form  where p and q are whole numbers, and the 
denominator is either 3,4,or 6:

If the denominator is 3, the reference angle is 
If the denominator is 4, the reference angle is 
If the denominator is 6, the reference angle is  

Edwin