$\displaystyle 19pi/4 $ ( i know this is two rotations plus 5pi/4) No, it isn't
$\displaystyle 420 deg$ ( i know this is one rotation plus 5pi/3) No, it isn't
You are going to have alot of trouble if you can't see why you are wrong there. Remember, one complete cycle is $\displaystyle 2\pi=360^\circ$