Найду корень уравнения: cosx=-0,3
x1 = -acos(-3/10) + 2*pi
x2 = acos(-3/10)
сумма
0 + -acos(-3/10) + 2*pi + acos(-3/10)
=
2*pi
произведение
1*(-acos(-3/10) + 2*pi)*acos(-3/10)
=
(-acos(-3/10) + 2*pi)*acos(-3/10)
x1 = -83.5568979741449
x2 = -14.4418595951695
x3 = 52.140971438247
x4 = 98.6554759340631
x5 = 77.2737126669653
x6 = -86.0891053197039
x7 = 73.5227347053447
x8 = -16.9740669407285
x9 = 48.3899934766264
x10 = -77.2737126669653
x11 = -98.6554759340631
x12 = 67.2395493981652
x13 = 20.7250449023491
x14 = 92.3722906268835
x15 = -23.2572522479081
x16 = 1.87548898081029
x17 = 89.8400832813245
x18 = 64.7073420526062
x19 = 27.0082302095286
x20 = 58.4241567454266
x21 = -29.5404375550876
x22 = 86.0891053197039
x23 = -89.8400832813245
x24 = 35.8236228622672
x25 = 4.40769632636929
x26 = 16.9740669407285
x27 = -33.2914155167082
x28 = 23.2572522479081
x29 = -79.8059200125243
x30 = -10.6908816335489
x31 = -54.673178783806
x32 = 29.5404375550876
x33 = -4.40769632636929
x34 = -70.9905273597857
x35 = -1.87548898081029
x36 = 10.6908816335489
x37 = -27.0082302095286
x38 = 14.4418595951695
x39 = 39.5746008238878
x40 = -35.8236228622672
x41 = 284.618827803892
x42 = -92.3722906268835
x43 = -60.9563640909856
x44 = 83.5568979741449
x45 = -42.1068081694468
x46 = -20.7250449023491
x47 = 60.9563640909856
x48 = 70.9905273597857
x49 = -73.5227347053447
x50 = -45.8577861310674
x51 = -142.63777308432
x52 = 8.15867428798988
x53 = -39.5746008238878
x54 = -48.3899934766264
x55 = 54.673178783806
x56 = -8.15867428798988
x57 = -58.4241567454266
x58 = -96.1232685885041
x59 = -64.7073420526062
x60 = 79.8059200125243
x61 = 33.2914155167082
x62 = 45.8577861310674
x63 = -67.2395493981652
x64 = 42.1068081694468
x65 = 96.1232685885041
x66 = -52.140971438247