Finding two coterminal angles in radians

[ChasingStars]

How do i find the positive and negative coterminal angles of 11pi/5. I know youre supposed to add or subtract 2pi. Im not exactly sure how to get the answer back into angle form after subtracting from my calculator. 11pi/5=.523 which i guessed and is equal to pi/6. im not sure how to get from .523 to the proper form of radians pi/6 :O HELP PLEASE!

 

[tkhunny]

You put your calculator down and ponder it in your mind. 2pi = 10pi/5

Addition of fractions is about all you need.