Pi * x / 3 = pi / 3 + 2 * pi * n; pi * x / 3 = 2 * pi / 3 + 2 * pi * n;
x = 1 + 6 * n; x = 2 + 6 * n;
x_min = 1, при n = 0.
(pi * x + 1) / 12 = +/- pi / 3 + 2 * pi * n;
pi * x + 1 = +/- 4 * pi + 24 * pi * n;
x = +/- 4 + 24 * n - 1 / pi;
x_min = 4 - 1 / pi, при n = 0.