El profesor se sorprenderá mucho al ver tu solución correcta😉
/ 2*pi\ cos|x + ----| = 0 \ 3 /
cambiando el signo de 0
Dividamos ambos miembros de la ecuación en -1
suma
pi 5*pi - -- + ---- 6 6
=
2*pi ---- 3
producto
-pi 5*pi ----*---- 6 6
=
2 -5*pi ------ 36
-5*pi^2/36
-pi x1 = ---- 6
5*pi x2 = ---- 6
x2 = 5*pi/6
x1 = 100.007366139275
x2 = -13.0899693899575
x3 = -53.9306738866248
x4 = 30.8923277602996
x5 = -63.3554518473942
x6 = 15.1843644923507
x7 = -97.9129710368819
x8 = -69.6386371545737
x9 = -25.6563400043166
x10 = 12.0427718387609
x11 = -22.5147473507269
x12 = -66.497044500984
x13 = 18.3259571459405
x14 = -3.66519142918809
x15 = 43.4586983746588
x16 = -31.9395253114962
x17 = -6.80678408277789
x18 = 78.0162175641465
x19 = 24.60914245312
x20 = 40.317105721069
x21 = 5.75958653158129
x22 = 84.2994028713261
x23 = -79.0634151153431
x24 = 96.8657734856853
x25 = -57.0722665402146
x26 = 27.7507351067098
x27 = -16.2315620435473
x28 = -88.4881930761125
x29 = 59.1666616426078
x30 = -85.3466004225227
x31 = 52.8834763354282
x32 = -47.6474885794452
x33 = -50.789081233035
x34 = 90.5825881785057
x35 = 74.8746249105567
x36 = -820.479281362534
x37 = 34.0339204138894
x38 = -101.054563690472
x39 = 8.90117918517108
x40 = 21.4675497995303
x41 = -75.9218224617533
x42 = -19.3731546971371
x43 = 46.6002910282486
x44 = 65.4498469497874
x45 = 93.7241808320955
x46 = -35.081117965086
x47 = 71.733032256967
x48 = 131.423292675173
x49 = -44.5058959258554
x50 = -82.2050077689329
x51 = -0.523598775598299
x52 = -41.3643032722656
x53 = 37.1755130674792
x54 = -94.7713783832921
x55 = -60.2138591938044
x56 = 87.4409955249159
x57 = 62.3082542961976
x58 = 2.61799387799149
x59 = -28.7979326579064
x60 = 49.7418836818384
x61 = 56.025068989018
x62 = -38.2227106186758
x63 = -9.94837673636768
x64 = -91.6297857297023
x65 = 81.1578102177363
x66 = -72.7802298081635
x67 = 68.5914396033772
x67 = 68.5914396033772