Найду корень уравнения: 2cosx + 1 = 0
Перенесём 1 в правую часть ур-ния
с изменением знака при 1
Разделим обе части ур-ния на 2
2*pi x1 = ---- 3
4*pi x2 = ---- 3
x1 = 67.0206432765823
x2 = 73.3038285837618
x3 = -79.5870138909414
x4 = 85.870199198121
x5 = -2.0943951023932
x6 = -27.2271363311115
x7 = 77.4926187885482
x8 = 10.471975511966
x9 = 8.37758040957278
x10 = 96.342174710087
x11 = 71.2094334813686
x12 = 35.6047167406843
x13 = 16.7551608191456
x14 = -23.0383461263252
x15 = 54.4542726622231
x16 = -8.37758040957278
x17 = -73.3038285837618
x18 = 23.0383461263252
x19 = 39.7935069454707
x20 = 33.5103216382911
x21 = -10.471975511966
x22 = -54.4542726622231
x23 = 48.1710873550435
x24 = 79.5870138909414
x25 = -16.7551608191456
x26 = -92.1533845053006
x27 = 98.4365698124802
x28 = 117.286125734019
x29 = -96.342174710087
x30 = 58.6430628670095
x31 = -20.943951023932
x32 = 90.0589894029074
x33 = -60.7374579694027
x34 = 20.943951023932
x35 = 2.0943951023932
x36 = -77.4926187885482
x37 = 29.3215314335047
x38 = -90.0589894029074
x39 = -29.3215314335047
x40 = 60.7374579694027
x41 = 14.6607657167524
x42 = -1623.15620435473
x43 = -14.6607657167524
x44 = -67.0206432765823
x45 = 630.412925820352
x46 = -46.0766922526503
x47 = 52.3598775598299
x48 = -39.7935069454707
x49 = -52.3598775598299
x50 = -98.4365698124802
x51 = 92.1533845053006
x52 = -41.8879020478639
x53 = -35.6047167406843
x54 = -58.6430628670095
x55 = 4.18879020478639
x56 = 46.0766922526503
x57 = -85.870199198121
x58 = -71.2094334813686
x59 = 416.784625376246
x60 = -4.18879020478639
x61 = -33.5103216382911
x62 = -64.9262481741891
x63 = -48.1710873550435
x64 = 64.9262481741891
x65 = 27.2271363311115
x66 = 41.8879020478639
x67 = 83.7758040957278
x68 = -83.7758040957278