Cos(x)=0.5 x=pi/3 since cos is postive in the fourth quadrant and first quadrant x=pi/3+2*pi*k where k is an integer fourth quadrant x=(-pi/3)+2*pi*k where k is an integer the first 3 values of K in the first quadrant are pi/3,7*pi/3,13*pi/3 the first three postive values for the fourth quadrant are 5*pi/3,11*pi/3,19*pi/3
so the smallest three are pi/3,5*pi/3,7*pi/3,11*pi/3
