El profesor se sorprenderá mucho al ver tu solución correcta😉
/pi\ cos(x) = cos|--| \5 /
suma
pi 9*pi -- + ---- 5 5
=
2*pi
producto
pi 9*pi --*---- 5 5
=
2 9*pi ----- 25
9*pi^2/25
pi x1 = -- 5
9*pi x2 = ---- 5
x2 = 9*pi/5
x1 = -37.0707933123596
x2 = -76.026542216873
x3 = 44.6106156809751
x4 = 24.5044226980004
x5 = -88.5929128312322
x6 = -25.7610597594363
x7 = 6.91150383789754
x8 = -94.8760981384118
x9 = -82.3097275240526
x10 = -24.5044226980004
x11 = -38.3274303737955
x12 = 68.4867198482575
x13 = 93.6194610769758
x14 = 30.78760800518
x15 = -23881.7590340589
x16 = 99.9026463841554
x17 = 19.4778744522567
x18 = -68.4867198482575
x19 = 94.8760981384118
x20 = 5.65486677646163
x21 = 81.0530904626167
x22 = -19.4778744522567
x23 = -13.1946891450771
x24 = 74.7699051554371
x25 = 18.2212373908208
x26 = -69.7433569096934
x27 = -11.9380520836412
x28 = 57.1769862953342
x29 = 13.1946891450771
x30 = 82.3097275240526
x31 = 38.3274303737955
x32 = -18.2212373908208
x33 = 69.7433569096934
x34 = -44.6106156809751
x35 = 43.3539786195391
x36 = 50.8938009881547
x37 = -74.7699051554371
x38 = -0.628318530717959
x39 = -87.3362757697962
x40 = -55.9203492338983
x41 = 76.026542216873
x42 = -63.4601716025138
x43 = -49.6371639267187
x44 = -30.78760800518
x45 = 25.7610597594363
x46 = -32.0442450666159
x47 = 62.2035345410779
x48 = -6.91150383789754
x49 = 11.9380520836412
x50 = -99.9026463841554
x51 = -43.3539786195391
x52 = 37.0707933123596
x53 = 88.5929128312322
x54 = 63.4601716025138
x55 = 49.6371639267187
x56 = 0.628318530717959
x57 = -5.65486677646163
x58 = -101.159283445591
x59 = -93.6194610769758
x60 = -81.0530904626167
x61 = -220.539804282003
x62 = -50.8938009881547
x63 = 55.9203492338983
x64 = -62.2035345410779
x65 = -57.1769862953342
x66 = 87.3362757697962
x67 = 32.0442450666159
x67 = 32.0442450666159