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