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cos(2*a)*cos(a) + sin(2*a)*sin(a) = 0
-pi a1 = ---- 2
pi a2 = -- 2
a2 = pi/2
suma
pi pi - -- + -- 2 2
=
0
producto
-pi pi ----*-- 2 2
=
2 -pi ----- 4
-pi^2/4
a1 = 48.6946861306418
a2 = 54.9778714378214
a3 = -98.9601685880785
a4 = 67.5442420521806
a5 = 76.9690200129499
a6 = 36.1283155162826
a7 = -3454.18112262198
a8 = 58.1194640914112
a9 = 14.1371669411541
a10 = -29.845130209103
a11 = 61.261056745001
a12 = -36.1283155162826
a13 = -4.71238898038469
a14 = -39.2699081698724
a15 = 1.5707963267949
a16 = -14.1371669411541
a17 = -64.4026493985908
a18 = -67.5442420521806
a19 = 92.6769832808989
a20 = -51.8362787842316
a21 = -86.3937979737193
a22 = 42.4115008234622
a23 = -17.2787595947439
a24 = -45.553093477052
a25 = -89.5353906273091
a26 = -1.5707963267949
a27 = 39.2699081698724
a28 = 23.5619449019235
a29 = 7.85398163397448
a30 = -58.1194640914112
a31 = -61.261056745001
a32 = -73.8274273593601
a33 = 73.8274273593601
a34 = 29.845130209103
a35 = 4.71238898038469
a36 = 86.3937979737193
a37 = 64.4026493985908
a38 = 89.5353906273091
a39 = -20.4203522483337
a40 = -387.986692718339
a41 = -26.7035375555132
a42 = 98.9601685880785
a43 = 51.8362787842316
a44 = 83.2522053201295
a45 = -48.6946861306418
a46 = -54.9778714378214
a47 = 70.6858347057703
a48 = -95.8185759344887
a49 = 26.7035375555132
a50 = 80.1106126665397
a51 = -23.5619449019235
a52 = -7.85398163397448
a53 = -83.2522053201295
a54 = -76.9690200129499
a55 = -42.4115008234622
a56 = -32.9867228626928
a57 = 17.2787595947439
a58 = 32.9867228626928
a59 = 20.4203522483337
a60 = -70.6858347057703
a61 = -10.9955742875643
a62 = -92.6769832808989
a63 = 45.553093477052
a64 = 10.9955742875643
a65 = -80.1106126665397
a66 = 95.8185759344887
a67 = -2266.65909956504
a67 = -2266.65909956504