Найду корень уравнения: cos(x)=5/6
x1 = -acos(5/6) + 2*pi
x2 = acos(5/6)
сумма
0 + -acos(5/6) + 2*pi + acos(5/6)
=
2*pi
произведение
1*(-acos(5/6) + 2*pi)*acos(5/6)
=
(-acos(5/6) + 2*pi)*acos(5/6)
x1 = -62.2461675283387
x2 = 69.7007239224326
x3 = -38.2847973865347
x4 = -88.5502798439714
x5 = 18.2638703780816
x6 = 49.6797969139795
x7 = -81.0957234498775
x8 = -25.7184267721755
x9 = 62.2461675283387
x10 = 32.0016120793551
x11 = -57.1343533080734
x12 = -87.3789087570571
x13 = -68.5293528355183
x14 = -6.86887085063674
x15 = -50.8511680008938
x16 = -44.5679826937143
x17 = -43.3966116068
x18 = -101.116650458331
x19 = 74.8125381426979
x20 = -30.8302409924408
x21 = -62109.8724470137
x22 = 63.417538615253
x23 = 68.5293528355183
x24 = 87.3789087570571
x25 = -37.1134262996204
x26 = -0.585685543457151
x27 = 5.69749976372244
x28 = 19.4352414649959
x29 = 37.1134262996204
x30 = 24.5470556852612
x31 = 88.5502798439714
x32 = 57.1343533080734
x33 = -5.69749976372244
x34 = -94.8334651511509
x35 = -11.980685070902
x36 = 81.0957234498775
x37 = -32.0016120793551
x38 = -99.9452793714162
x39 = 43.3966116068
x40 = 30.8302409924408
x41 = -13.1520561578163
x42 = -24.5470556852612
x43 = 11.980685070902
x44 = 13.1520561578163
x45 = -82.2670945367918
x46 = 93.6620940642366
x47 = 44.5679826937143
x48 = 0.585685543457151
x49 = -49.6797969139795
x50 = 6.86887085063674
x51 = -69.7007239224326
x52 = -55.9629822211591
x53 = 55.9629822211591
x54 = 75.9839092296122
x55 = 99.9452793714162
x56 = -19.4352414649959
x57 = -75.9839092296122
x58 = 25.7184267721755
x59 = 38.2847973865347
x60 = -74.8125381426979
x61 = 50.8511680008938
x62 = -63.417538615253
x63 = -93.6620940642366
x64 = 94.8334651511509
x65 = 82.2670945367918
x66 = -18.2638703780816