Найду корень уравнения: cosa=4/5
a1 = -acos(4/5) + 2*pi
a2 = acos(4/5)
сумма
0 + -acos(4/5) + 2*pi + acos(4/5)
=
2*pi
произведение
1*(-acos(4/5) + 2*pi)*acos(4/5)
=
(-acos(4/5) + 2*pi)*acos(4/5)
a1 = 74.7547225773617
a2 = -82.3249101021279
a3 = -6.92668641597287
a4 = 18.2060548127455
a5 = -69.7585394877687
a6 = 69.7585394877687
a7 = 88.6080954093075
a8 = -55.905166655823
a9 = 82.3249101021279
a10 = 87.3210931917209
a11 = 0.643501108793284
a12 = -62.1883519630026
a13 = -101.174466023667
a14 = -24.4892401199251
a15 = -93.6042784989005
a16 = -37.0556107342842
a17 = 38.3426129518708
a18 = 49.6219813486434
a19 = -74.7547225773617
a20 = 19.493057030332
a21 = 44.6257982590504
a22 = 5.6396841983863
a23 = 50.90898356623
a24 = 24.4892401199251
a25 = -76.0417247949483
a26 = 99.8874638060801
a27 = -0.643501108793284
a28 = 13.2098717231525
a29 = -12486222.9460819
a30 = -13.2098717231525
a31 = -25.7762423375116
a32 = -88.6080954093075
a33 = -50.90898356623
a34 = 93.6042784989005
a35 = -43.3387960414638
a36 = -30.7724254271046
a37 = 3550.64319966526
a38 = -44.6257982590504
a39 = -57.1921688734096
a40 = 37.0556107342842
a41 = 76.0417247949483
a42 = -5.6396841983863
a43 = -3210.06419085998
a44 = 81.0379078845413
a45 = -99.8874638060801
a46 = -81.0379078845413
a47 = -94.8912807164871
a48 = 32.0594276446912
a49 = -68.4715372701822
a50 = 55.905166655823
a51 = -11.9228695055659
a52 = 94.8912807164871
a53 = 43.3387960414638
a54 = -49.6219813486434
a55 = 62.1883519630026
a56 = 30.7724254271046
a57 = -19.493057030332
a58 = -18.2060548127455
a59 = 25.7762423375116
a60 = 57.1921688734096
a61 = -87.3210931917209
a62 = 63.4753541805892
a63 = -32.0594276446912
a64 = 11.9228695055659
a65 = -63.4753541805892
a66 = 6.92668641597287
a67 = 68.4715372701822
a68 = -38.3426129518708