Найду корень уравнения: 5cosx-1=0
Перенесём -1 в правую часть ур-ния
с изменением знака при -1
Разделим обе части ур-ния на 5
x1 = -acos(1/5) + 2*pi
x2 = acos(1/5)
сумма
0 + -acos(1/5) + 2*pi + acos(1/5)
=
2*pi
произведение
1*(-acos(1/5) + 2*pi)*acos(1/5)
=
(-acos(1/5) + 2*pi)*acos(1/5)
x1 = -64.2012914778004
x2 = 834.29420744888
x3 = -70.48447678498
x4 = -92.8783412016892
x5 = -42.6128587442525
x6 = -1.36943840600457
x7 = 17.4801175155342
x8 = 61.4624146657913
x9 = -95.6172180136984
x10 = -51.6349208634413
x11 = -55.1792293586117
x12 = -67.7455999729709
x13 = 55.1792293586117
x14 = -76.7676620921596
x15 = -30.0464881298934
x16 = 45.3517355562617
x17 = 20.2189943275433
x18 = -13.9358090203637
x19 = -86.5951558945096
x20 = -23.7633028227138
x21 = -11.1969322083546
x22 = 92.8783412016892
x23 = -61.4624146657913
x24 = 7.65262371318415
x25 = -39.0685502490821
x26 = 57.9181061706208
x27 = 74.0287852801505
x28 = 1.36943840600457
x29 = 23.7633028227138
x30 = -99.1615265088688
x31 = 108.183588628058
x32 = 86.5951558945096
x33 = 39.0685502490821
x34 = 67.7455999729709
x35 = -654.820710352682
x36 = -36.329673437073
x37 = -32.7853649419025
x38 = -6702.78928435461
x39 = -26.5021796347229
x40 = 64.2012914778004
x41 = 89.3340327065188
x42 = 42.6128587442525
x43 = 80.3119705873301
x44 = -80.3119705873301
x45 = -7.65262371318415
x46 = -83.0508473993392
x47 = -48.8960440514321
x48 = 26.5021796347229
x49 = 95.6172180136984
x50 = -45.3517355562617
x51 = 70.48447678498
x52 = 36.329673437073
x53 = 11.1969322083546
x54 = -4.91374690117502
x55 = -20.2189943275433
x56 = 83.0508473993392
x57 = 13.9358090203637
x58 = 51.6349208634413
x59 = 76.7676620921596
x60 = 48.8960440514321
x61 = -17.4801175155342
x62 = 4.91374690117502
x63 = 30.0464881298934
x64 = -89.3340327065188
x65 = 99.1615265088688
x66 = 32.7853649419025
x67 = -57.9181061706208
x68 = -74.0287852801505