Найду корень уравнения: (cos(x)+1)/3=0
Перенесём 1/3 в правую часть ур-ния
с изменением знака при 1/3
Разделим обе части ур-ния на 1/3
x1 = -78.5398160472843
x2 = 15.7079627593774
x3 = -34.5575188899093
x4 = 3.14159306054457
x5 = -72.2566308657983
x6 = 9.42477748794163
x7 = -59.6902606928653
x8 = -9.4247781365785
x9 = -9.42477744529557
x10 = -47.1238901083229
x11 = -97.3893717476911
x12 = -72.2566311847166
x13 = 21.9911480932338
x14 = 53.4070746418597
x15 = 78.5398149750205
x16 = -1297.47776823207
x17 = -65.9734461969855
x18 = 47.1238902162437
x19 = -65.9734453607004
x20 = -15.7079632965989
x21 = 34.5575195449229
x22 = 84.8230021335997
x23 = -28.2743337069329
x24 = -47.1238893275319
x25 = 28.2743338651796
x26 = -84.8230020565447
x27 = 342.433596605258
x28 = 40.8407049800347
x29 = -65.9734449870253
x30 = 9.42477826738203
x31 = -72.2566315419804
x32 = 78.5398168562347
x33 = 28.2743335663982
x34 = -1127.83176318906
x35 = -84.8230012511693
x36 = 59.6902599104079
x37 = 34.5575190219169
x38 = 91.1061865667532
x39 = 40.8407042062167
x40 = -40.8407049008781
x41 = 28.2743343711514
x42 = -21.991148226056
x43 = -15.707962774825
x44 = -15.7079635641079
x45 = -3.14159295109225
x46 = -59.6902604578012
x47 = 78.5398161804942
x48 = 72.2566310277176
x49 = 53.4070766553897
x50 = -3.14159217367683
x51 = -91.1061864815274
x52 = 21.9911485852059
x53 = 91.1061873718352
x54 = -59.6902599212271
x55 = -91.106187265474
x56 = 15.7079634518075
x57 = 59.6902600526626
x58 = -53.4070745963886
x59 = -28.2743343914215
x60 = 97.3893717959212
x61 = 53.407075424589
x62 = -53.4070745786761
x63 = 3.1415922548952
x64 = 59.6902606104322
x65 = -28.2743340989896
x66 = 72.2566315166773
x67 = -97.3893716284562
x68 = -65.9734457649277
x69 = -40.8407040952604
x70 = 78.5398152766482
x71 = 40.8407045792514
x72 = 72.2566306985
x73 = 21.9911489072506
x74 = -34.5575196658297
x75 = 65.9734452390837
x76 = 15.7079629803241
x77 = 65.9734460390947
x78 = -21.9911490521325
x79 = -78.5398168194507
x80 = -97.3893724533348
x81 = 65.9734457529812
x82 = 40.8407045848602
x83 = 15.707963957033
x84 = 84.8230013636028
x85 = 47.123889410773
x86 = 78.5398166181283
x87 = -53.407075294995
x88 = 97.389372581711
x89 = 34.5575197055812
x90 = -40.8407049290801
x91 = -9.42477752082051
x92 = -21.9911485864417