Найду корень уравнения: cos(x)=-0,7
x1 = -acos(-7/10) + 2*pi
x2 = acos(-7/10)
сумма
0 + -acos(-7/10) + 2*pi + acos(-7/10)
=
2*pi
произведение
1*(-acos(-7/10) + 2*pi)*acos(-7/10)
=
(-acos(-7/10) + 2*pi)*acos(-7/10)
x1 = -65.1780468952015
x2 = -22.7865474053127
x3 = 29.0697327124923
x4 = 2.34619382340565
x5 = -10.2201767909535
x6 = 40.0453056664832
x7 = 73.0520298627494
x8 = 85.6184004771086
x9 = 66.7688445555698
x10 = -2.34619382340565
x11 = 14.9125644377648
x12 = 58.8948615880219
x13 = 35.3529180196719
x14 = -29.0697327124923
x15 = 41.6361033268515
x16 = -98.1847710914677
x17 = -8.62937913058524
x18 = -3.93699148377394
x19 = 90.3107881239199
x20 = -35.3529180196719
x21 = -41.6361033268515
x22 = -33.7621203593036
x23 = -14.9125644377648
x24 = 96.5939734310994
x25 = 21.1957497449444
x26 = 77.7444175095607
x27 = -54.2024739412106
x28 = 71.4612322023811
x29 = 52.6116762808423
x30 = -90.3107881239199
x31 = -79.335215169929
x32 = 16.5033620981331
x33 = -2850.21993563613
x34 = 10.2201767909535
x35 = 46.3284909736628
x36 = -27.478935052124
x37 = 22.7865474053127
x38 = 33.7621203593036
x39 = -58.8948615880219
x40 = 60.4856592483902
x41 = -66.7688445555698
x42 = 8.62937913058524
x43 = 588.273225051475
x44 = -21.1957497449444
x45 = 91.9015857842881
x46 = -96.5939734310994
x47 = -47.919288634031
x48 = 54.2024739412106
x49 = -60.4856592483902
x50 = -5990.22179156555
x51 = -71.4612322023811
x52 = 98.1847710914677
x53 = -52.6116762808423
x54 = -77.7444175095607
x55 = -40.0453056664832
x56 = -84.0276028167403
x57 = 3.93699148377394
x58 = -85.6184004771086
x59 = 65.1780468952015
x60 = -73.0520298627494
x61 = 47.919288634031
x62 = 79.335215169929
x63 = -91.9015857842881
x64 = -46.3284909736628
x65 = 84.0276028167403
x66 = 27.478935052124
x67 = -16.5033620981331