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