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/-pi \ x_1 = - acos|----| + 2*pi \ 4 /
/pi\ x_2 = - acos|--| + 2*pi \4 /
/-pi \ x_3 = acos|----| \ 4 /
/pi\ x_4 = acos|--| \4 /
сумма
/-pi \ /pi\ /-pi \ /pi\ - acos|----| + 2*pi + - acos|--| + 2*pi + acos|----| + acos|--| \ 4 / \4 / \ 4 / \4 /
=
4*pi
произведение
/-pi \ /pi\ /-pi \ /pi\ - acos|----| + 2*pi * - acos|--| + 2*pi * acos|----| * acos|--| \ 4 / \4 / \ 4 / \4 /
=
/ /-pi \ \ / /pi\ \ /-pi \ /pi\ |- acos|----| + 2*pi|*|- acos|--| + 2*pi|*acos|----|*acos|--| \ \ 4 / / \ \4 / / \ 4 / \4 /
x1 = -32.0833837519263
x2 = 63.4993102878243
x3 = -60.3577176342345
x4 = 162.695360770641
x5 = -38.3665690591059
x6 = 5.6157280911512
x7 = -19.5170131375671
x8 = 19.5170131375671
x9 = -18.1820987055104
x10 = 69.7824955950038
x11 = 60.3577176342345
x12 = 8.757320744741
x13 = -85.4904588629528
x14 = 38.3665690591059
x15 = 98.056829477312
x16 = -16.3754204839774
x17 = 32.0833837519263
x18 = 99.863507698845
x19 = -91.7736441701324
x20 = -99.863507698845
x21 = 22.6586057911569
x22 = -54.0745323270549
x23 = -98.056829477312
x24 = -49.5980252414083
x25 = -40.1732472806389
x26 = -71.5891738165369
x27 = 71.5891738165369
x28 = 52.7396178949981
x29 = 91.7736441701324
x30 = 93.5803223916654
x31 = -10.0922351767978
x32 = 85.4904588629528
x33 = 54.0745323270549
x34 = 30.7484693198695
x35 = -62.1643958557675
x36 = -55.8812105485879
x37 = 66.640902941414
x38 = -63.4993102878243
x39 = 68.4475811629471
x40 = 44.6497543662855
x41 = -93.5803223916654
x42 = -68.4475811629471
x43 = 84.155544430896
x44 = 10.0922351767978
x45 = -21.3236913591002
x46 = 46.4564325878185
x47 = -47.7913470198753
x48 = 3.80904986961818
x49 = 76.0656809021834
x50 = 55.8812105485879
x51 = -27.6068766662798
x52 = -43.3148399342287
x53 = -2.47413543756141
x54 = -33.8900619734593
x55 = 82.348866209363
x56 = -84.155544430896
x57 = 2.47413543756141
x58 = -24.46528401269
x59 = 41.5081617126957
x60 = -82.348866209363
x61 = -77.8723591237164
x62 = 62.1643958557675
x63 = 0.667457216028384
x64 = 25.8001984447467
x65 = 47.7913470198753
x66 = 16.3754204839774
x67 = -3.80904986961818
x68 = 33.8900619734593
x69 = 24.46528401269
x70 = 90.4387297380756
x71 = -69.7824955950038
x72 = -90.4387297380756
x73 = -76.0656809021834
x74 = 88.6320515165426
x75 = -167.171867856287
x76 = 77.8723591237164
x77 = -11.8989133983308
x78 = 11.8989133983308
x79 = -46.4564325878185
x80 = 18.1820987055104
x81 = 40.1732472806389
x82 = -65.3059885093573
x83 = -25.8001984447467
x84 = -5.6157280911512
x85 = -87.2971370844858
x86 = 49.5980252414083
x87 = -41.5081617126957
x88 = 27.6068766662798
x89 = -120.047978052441
x90 = 74.7307664701267
x91 = 96.7219150452552
x91 = 96.7219150452552