Найду корень уравнения: 5cos(-x)=0
с изменением знака при 0
Разделим обе части ур-ния на 5
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 = 89.5353906273091
x2 = -45.553093477052
x3 = -29.845130209103
x4 = -83.2522053201295
x5 = -387.986692718339
x6 = 64.4026493985908
x7 = 7.85398163397448
x8 = 36.1283155162826
x9 = 86.3937979737193
x10 = 42.4115008234622
x11 = -20.4203522483337
x12 = -48.6946861306418
x13 = -32.9867228626928
x14 = 17.2787595947439
x15 = -26.7035375555132
x16 = 58.1194640914112
x17 = 32.9867228626928
x18 = -39.2699081698724
x19 = 98.9601685880785
x20 = -89.5353906273091
x21 = 29.845130209103
x22 = -54.9778714378214
x23 = 1.5707963267949
x24 = -10.9955742875643
x25 = -92.6769832808989
x26 = 70.6858347057703
x27 = 10.9955742875643
x28 = 45.553093477052
x29 = -73.8274273593601
x30 = -36.1283155162826
x31 = 61.261056745001
x32 = -14.1371669411541
x33 = 76.9690200129499
x34 = 26.7035375555132
x35 = 92.6769832808989
x36 = 83.2522053201295
x37 = 73.8274273593601
x38 = -86.3937979737193
x39 = -2266.65909956504
x40 = 14.1371669411541
x41 = 20.4203522483337
x42 = -80.1106126665397
x43 = -3639.53508918378
x44 = 23.5619449019235
x45 = -61.261056745001
x46 = -64.4026493985908
x47 = -51.8362787842316
x48 = 39.2699081698724
x49 = -4.71238898038469
x50 = -98.9601685880785
x51 = -58.1194640914112
x52 = -95.8185759344887
x53 = 4.71238898038469
x54 = 48.6946861306418
x55 = -7.85398163397448
x56 = -67.5442420521806
x57 = -76.9690200129499
x58 = -17.2787595947439
x59 = -1.5707963267949
x60 = 51.8362787842316
x61 = -70.6858347057703
x62 = -45375.5934921242
x63 = -23.5619449019235
x64 = 67.5442420521806
x65 = 54.9778714378214
x66 = 95.8185759344887
x67 = 80.1106126665397
x68 = -42.4115008234622