how is it 0 or 2pi/3 ?

Question

how is pi/6+theta= 0 or 2pi/3 ?

Answer 1

well if pi/6 + theta = 0 then theta = -pi/6 which is -30 degrees

which turns out to be the same as 330 degrees

which is the same as 330 * pi/180 = 33*pi/18 = 11*pi/3

2*pi/3 is 120 degrees....

are you sure there is not a trig function involved???