Найду корень уравнения: 1-2*cos(x)=0
Перенесём 1 в правую часть ур-ния
с изменением знака при 1
Разделим обе части ур-ния на -2
pi x1 = -- 3
5*pi x2 = ---- 3
сумма
pi 5*pi 0 + -- + ---- 3 3
=
2*pi
произведение
pi 5*pi 1*--*---- 3 3
=
2 5*pi ----- 9
x1 = -51.3126800086333
x2 = 5.23598775598299
x3 = 76.4454212373516
x4 = -70.162235930172
x5 = -57.5958653158129
x6 = -38.7463093942741
x7 = -1.0471975511966
x8 = 74.3510261349584
x9 = 82.7286065445312
x10 = -80.634211442138
x11 = 63.8790506229925
x12 = 1.0471975511966
x13 = -11.5191730631626
x14 = -55.5014702134197
x15 = -89.0117918517108
x16 = 32.4631240870945
x17 = -86.9173967493176
x18 = 7.33038285837618
x19 = 24.0855436775217
x20 = -7.33038285837618
x21 = 38.7463093942741
x22 = 51.3126800086333
x23 = -26.1799387799149
x24 = 95.2949771588904
x25 = -13.6135681655558
x26 = -17.8023583703422
x27 = 57.5958653158129
x28 = 19.8967534727354
x29 = -68.0678408277789
x30 = 13.6135681655558
x31 = 93.2005820564972
x32 = 61.7846555205993
x33 = -36.6519142918809
x34 = -42.9350995990605
x35 = -61.7846555205993
x36 = -359.188760060433
x37 = 17.8023583703422
x38 = -82.7286065445312
x39 = -95.2949771588904
x40 = -99.4837673636768
x41 = 42.9350995990605
x42 = 26.1799387799149
x43 = -19.8967534727354
x44 = -49.2182849062401
x45 = 30.3687289847013
x46 = 55.5014702134197
x47 = -5.23598775598299
x48 = 11.5191730631626
x49 = -93.2005820564972
x50 = -76.4454212373516
x51 = -32.4631240870945
x52 = 36.6519142918809
x53 = 89.0117918517108
x54 = -74.3510261349584
x55 = 68.0678408277789
x56 = -225.147473507269
x57 = 45.0294947014537
x58 = -45.0294947014537
x59 = 86.9173967493176
x60 = -63.8790506229925
x61 = 70.162235930172
x62 = -30.3687289847013
x63 = 49.2182849062401
x64 = -24.0855436775217
x65 = 99.4837673636768
x66 = 80.634211442138
x67 = 1651.43053823704