Найду корень уравнения: cos(x)=-0,6
x1 = -acos(-3/5) + 2*pi
x2 = acos(-3/5)
сумма
0 + -acos(-3/5) + 2*pi + acos(-3/5)
=
2*pi
произведение
1*(-acos(-3/5) + 2*pi)*acos(-3/5)
=
(-acos(-3/5) + 2*pi)*acos(-3/5)
x1 = -90.1788917361024
x2 = 22.9184437931302
x3 = -58.7629652002045
x4 = -8679.2932066506
x5 = -2.21429743558818
x6 = 54.3343703290281
x7 = -35.4848144074893
x8 = 85.750296864926
x9 = -48.0511850218485
x10 = -52.4797798930249
x11 = 48.0511850218485
x12 = -83.8957064289228
x13 = -29.2016291003098
x14 = -77.6125211217432
x15 = -71.3293358145636
x16 = -73.1839262505669
x17 = -27.3470386643065
x18 = 35.4848144074893
x19 = -98.3166674792852
x20 = 46.1965945858453
x21 = -16.6352584859506
x22 = -66.9007409433873
x23 = -96.462077043282
x24 = 41.7679997146689
x25 = 39.9134092786657
x26 = 98.3166674792852
x27 = 79.4671115577464
x28 = 10.352073178771
x29 = 4.06888787159141
x30 = 29.2016291003098
x31 = -39.9134092786657
x32 = 33.6302239714861
x33 = 65.046150507384
x34 = -22.9184437931302
x35 = -14.7806680499474
x36 = -21.0638533571269
x37 = -46.1965945858453
x38 = 60.6175556362077
x39 = -85.750296864926
x40 = 2.21429743558818
x41 = -4.06888787159141
x42 = -79.4671115577464
x43 = -92.0334821721056
x44 = 90.1788917361024
x45 = -8.49748274276777
x46 = 52.4797798930249
x47 = 14.7806680499474
x48 = 83.8957064289228
x49 = 66.9007409433873
x50 = 8.49748274276777
x51 = -33.6302239714861
x52 = -54.3343703290281
x53 = 73.1839262505669
x54 = 16.6352584859506
x55 = 92.0334821721056
x56 = 77.6125211217432
x57 = -65.046150507384
x58 = 27.3470386643065
x59 = -60.6175556362077
x60 = 71.3293358145636
x61 = 96.462077043282
x62 = -10.352073178771
x63 = 58.7629652002045
x64 = -41.7679997146689
x65 = 21.0638533571269