Найду корень уравнения: 4*cos(a)=0
с изменением знака при 0
Разделим обе части ур-ния на 4
pi a1 = -- 2
3*pi a2 = ---- 2
сумма
pi 3*pi 0 + -- + ---- 2 2
=
2*pi
произведение
pi 3*pi 1*--*---- 2 2
=
2 3*pi ----- 4
a1 = 32.9867228626928
a2 = -54.9778714378214
a3 = -20.4203522483337
a4 = -23.5619449019235
a5 = -14.1371669411541
a6 = 92.6769832808989
a7 = 10.9955742875643
a8 = 83.2522053201295
a9 = 54.9778714378214
a10 = -76.9690200129499
a11 = 26.7035375555132
a12 = 51.8362787842316
a13 = -89.5353906273091
a14 = -7.85398163397448
a15 = -70.6858347057703
a16 = -45.553093477052
a17 = 23.5619449019235
a18 = 39.2699081698724
a19 = 29.845130209103
a20 = 73.8274273593601
a21 = 86.3937979737193
a22 = -26.7035375555132
a23 = 20.4203522483337
a24 = -387.986692718339
a25 = -51.8362787842316
a26 = -29.845130209103
a27 = -32.9867228626928
a28 = -67.5442420521806
a29 = 61.261056745001
a30 = 67.5442420521806
a31 = 76.9690200129499
a32 = 7.85398163397448
a33 = 64.4026493985908
a34 = -36.1283155162826
a35 = 89.5353906273091
a36 = -10.9955742875643
a37 = -95.8185759344887
a38 = -48.6946861306418
a39 = 45.553093477052
a40 = 80.1106126665397
a41 = -42.4115008234622
a42 = -80.1106126665397
a43 = -61.261056745001
a44 = -2266.65909956504
a45 = -17.2787595947439
a46 = 48.6946861306418
a47 = -4.71238898038469
a48 = -39.2699081698724
a49 = -64.4026493985908
a50 = -86.3937979737193
a51 = 4.71238898038469
a52 = -73.8274273593601
a53 = -83.2522053201295
a54 = 42.4115008234622
a55 = 58.1194640914112
a56 = -92.6769832808989
a57 = 14.1371669411541
a58 = 95.8185759344887
a59 = 70.6858347057703
a60 = 1.5707963267949
a61 = 36.1283155162826
a62 = -1.5707963267949
a63 = -168.075206967054
a64 = 98.9601685880785
a65 = 17.2787595947439
a66 = -58.1194640914112
a67 = -98.9601685880785