Найду корень уравнения: ctg(x)=-6
сумма
0 - acot(6)
=
-acot(6)
произведение
1*-acot(6)
=
-acot(6)
x1 = -15.8731119453636
x2 = 46.9587411264323
x3 = -37.8642605204921
x4 = 21.8259998977139
x5 = 28.1091852048935
x6 = -44.1474458276717
x7 = 6.11803662976496
x8 = 94.0826309302792
x9 = -59.8554090956207
x10 = 72.0914823551506
x11 = -81.8465576707492
x12 = 50.1003337800221