Найду корень уравнения: cot(pi*x/12)=-1
x1 = -99.0000000000000
x2 = -75.0000000000000
x3 = -51.0000000000000
x4 = 69.0000000000000
x5 = 45.0000000000000
x6 = 57.0000000000000
x7 = 21.0000000000000
x8 = -87.0000000000000
x9 = 81.0000000000000
x10 = -63.0000000000000
x11 = 33.0000000000000
x12 = -39.0000000000000
x13 = -15.0000000000000
x14 = -3.00000000000000
x15 = 9.00000000000000
x16 = -27.0000000000000
x17 = 105.000000000000
x18 = 93.0000000000000