Найду корень уравнения: ctan(x)=4
x1 = -28.0293552191813
x2 = -21.7461699120017
x3 = -50.0205037943098
x4 = -65.7284670622588
x5 = 59.9352390813329
x6 = -90.8612082909771
x7 = 37.9440905062044
x8 = 66.2184243885125
x9 = -59.4452817550792
x10 = 44.227275813384
x11 = -43.7373184871302
x12 = -46.87891114072
x13 = -87.7196156373873
x14 = 81.9263876564615
x15 = 25.3777198918452
x16 = -78.294837676618
x17 = -72.0116523694384
x18 = -6.03820664405272
x19 = 88.2095729636411
x20 = 75.6432023492819
x21 = 22.2361272382554
x22 = -53.1620964478996
x23 = 53.6520537741534
x24 = 15.9529419310758
x25 = 917.590033511347
x26 = -94.0028009445669