Найду корень уравнения: cos(x)=-3/7
x1 = -acos(-3/7) + 2*pi
x2 = acos(-3/7)
сумма
0 + -acos(-3/7) + 2*pi + acos(-3/7)
=
2*pi
произведение
1*(-acos(-3/7) + 2*pi)*acos(-3/7)
=
(-acos(-3/7) + 2*pi)*acos(-3/7)
x1 = -54.5349603937477
x2 = 27.1464485995869
x3 = 92.2340722368253
x4 = -92.2340722368253
x5 = -67.1013310081069
x6 = 29.4022191650294
x7 = -29.4022191650294
x8 = -52.2791898283052
x9 = 48.2517750865682
x10 = 2.01370737086854
x11 = -20.8632632924073
x12 = 10.5526632434906
x13 = 73.3845163152865
x14 = -96.2614869785623
x15 = 71.128745749844
x16 = -98.5172575440048
x17 = 23.1190338578498
x18 = -89.9783016713828
x19 = 35.685404472209
x20 = -71.128745749844
x21 = 4.26947793631105
x22 = -16.8358485506702
x23 = 16.8358485506702
x24 = 58.5623751354848
x25 = -33.4296339067665
x26 = 54.5349603937477
x27 = 79.6677016224661
x28 = 45.9960045211256
x29 = 98.5172575440048
x30 = -10.5526632434906
x31 = -23.1190338578498
x32 = 60.8181457009273
x33 = -41.9685897793886
x34 = -8.29689267804812
x35 = -83.6951163642032
x36 = 77.4119310570236
x37 = -278.47386088677
x38 = 39.7128192139461
x39 = 20.8632632924073
x40 = -73.3845163152865
x41 = 96.2614869785623
x42 = -35.685404472209
x43 = -39.7128192139461
x44 = -77.4119310570236
x45 = 52.2791898283052
x46 = 64.8455604426644
x47 = 14.5800779852277
x48 = -4.26947793631105
x49 = 8.29689267804812
x50 = 67.1013310081069
x51 = -45.9960045211256
x52 = 85.9508869296457
x53 = 83.6951163642032
x54 = -58.5623751354848
x55 = -85.9508869296457
x56 = -79.6677016224661
x57 = -27.1464485995869
x58 = -2.01370737086854
x59 = -9219.44655300332
x60 = 41.9685897793886
x61 = -48.2517750865682
x62 = -64.8455604426644
x63 = 33.4296339067665
x64 = 89.9783016713828
x65 = -14.5800779852277
x66 = -60.8181457009273