/ / / _____________\\ / / _____________\ \\
| | | / ___ || | | / ___ | ||
| | 2*atan\\/ 7 + 4*\/ 3 /| | 2*pi 2*atan\\/ 7 + 4*\/ 3 / 2*pi ||
Or|And|0 <= x, x < ------------------------|, And|x <= ----, - ------------------------ + ---- < x||
\ \ 3 / \ 3 3 3 //
$$\left(0 \leq x \wedge x < \frac{2 \operatorname{atan}{\left(\sqrt{4 \sqrt{3} + 7} \right)}}{3}\right) \vee \left(x \leq \frac{2 \pi}{3} \wedge - \frac{2 \operatorname{atan}{\left(\sqrt{4 \sqrt{3} + 7} \right)}}{3} + \frac{2 \pi}{3} < x\right)$$
((0 <= x)∧(x < 2*atan(sqrt(7 + 4*sqrt(3)))/3))∨((x <= 2*pi/3)∧(-2*atan(sqrt(7 + 4*sqrt(3)))/3 + 2*pi/3 < x))
/ _____________\ / _____________\
| / ___ | | / ___ |
2*atan\\/ 7 + 4*\/ 3 / 2*atan\\/ 7 + 4*\/ 3 / 2*pi 2*pi
[0, ------------------------) U (- ------------------------ + ----, ----]
3 3 3 3
$$x\ in\ \left[0, \frac{2 \operatorname{atan}{\left(\sqrt{4 \sqrt{3} + 7} \right)}}{3}\right) \cup \left(- \frac{2 \operatorname{atan}{\left(\sqrt{4 \sqrt{3} + 7} \right)}}{3} + \frac{2 \pi}{3}, \frac{2 \pi}{3}\right]$$
x in Union(Interval.Ropen(0, 2*atan(sqrt(4*sqrt(3) + 7))/3), Interval.Lopen(-2*atan(sqrt(4*sqrt(3) + 7))/3 + 2*pi/3, 2*pi/3))