Найду корень уравнения: cos(x)+cos(x)=0
с изменением знака при 0
Разделим обе части ур-ния на 2
pi x1 = -- 2
3*pi x2 = ---- 2
сумма
pi 3*pi 0 + -- + ---- 2 2
=
2*pi
произведение
pi 3*pi 1*--*---- 2 2
=
2 3*pi ----- 4
x1 = -58.1194640914112
x2 = 36.1283155162826
x3 = -64.4026493985908
x4 = -89.5353906273091
x5 = -76.9690200129499
x6 = 51.8362787842316
x7 = 67.5442420521806
x8 = -10.9955742875643
x9 = -86.3937979737193
x10 = 32.9867228626928
x11 = 89.5353906273091
x12 = 64.4026493985908
x13 = 17.2787595947439
x14 = 70.6858347057703
x15 = -4.71238898038469
x16 = 23.5619449019235
x17 = 76.9690200129499
x18 = -61.261056745001
x19 = 86.3937979737193
x20 = 48.6946861306418
x21 = 73.8274273593601
x22 = 29.845130209103
x23 = -70.6858347057703
x24 = -168.075206967054
x25 = -7.85398163397448
x26 = -14.1371669411541
x27 = -73.8274273593601
x28 = -32.9867228626928
x29 = 1.5707963267949
x30 = -98.9601685880785
x31 = -42.4115008234622
x32 = -17.2787595947439
x33 = 4.71238898038469
x34 = 26.7035375555132
x35 = 83.2522053201295
x36 = 92.6769832808989
x37 = -51.8362787842316
x38 = 54.9778714378214
x39 = -20.4203522483337
x40 = 61.261056745001
x41 = 80.1106126665397
x42 = -92.6769832808989
x43 = -83.2522053201295
x44 = 98.9601685880785
x45 = 7.85398163397448
x46 = 42.4115008234622
x47 = -95.8185759344887
x48 = -387.986692718339
x49 = -1.5707963267949
x50 = -29.845130209103
x51 = -39.2699081698724
x52 = -23.5619449019235
x53 = 20.4203522483337
x54 = -54.9778714378214
x55 = 58.1194640914112
x56 = -48.6946861306418
x57 = -36.1283155162826
x58 = 95.8185759344887
x59 = 10.9955742875643
x60 = 39.2699081698724
x61 = -80.1106126665397
x62 = 45.553093477052
x63 = -26.7035375555132
x64 = -45.553093477052
x65 = -2266.65909956504
x66 = 14.1371669411541
x67 = -67.5442420521806