tan 2x = akar 3 untuk ( 0 < x , < 2 phi)

dianggap 180°= Pi, (bukan Phy)
tan(2x) = tan(pi/3)
2x = pi/3 + kpi
x = pi/6 + kpi/2

k = 0 → x = pi/6
k= 1 → x = 2pi/3
k = 2 → x = 7pi/6
k = 3 → x = 5pi/3