Найду корень уравнения: tan(x/3)=-4
x1 = -41.6765648340816
x2 = -13.4022309517735
x3 = -32.2517868733122
x4 = 61.9959927343816
x5 = -69.9508987163898
x6 = -22.8270089125429
x7 = -98.2252325986979
x8 = 99.6951045774591
x9 = 109.119882538228
x10 = 24.296880891304
x11 = 5.44732496976528
x12 = 71.4207706951509
x13 = 90.2703266166897
x14 = 33.7216588520734
x15 = 52.5712147736122
x16 = 14.8721029305347
x17 = -60.5261207556204
x18 = 80.8455486559203
x19 = -79.3756766771591
x20 = -3.9774529910041
x21 = -51.101342794851