El profesor se sorprenderá mucho al ver tu solución correcta😉
sin(2*x) -------- = 0 cos(x)
sin2*x = 0
x1 = -18.8495559215388
x2 = -53.4070751110265
x3 = -37.6991118430775
x4 = -59.6902604182061
x5 = -15.707963267949
x6 = -113.097335529233
x7 = -56.5486677646163
x8 = 12.5663706143592
x9 = 3.14159265358979
x10 = -31.4159265358979
x11 = 84.8230016469244
x12 = -81.6814089933346
x13 = 94.2477796076938
x14 = 21.9911485751286
x15 = 0.0
x16 = -87.9645943005142
x17 = 81.6814089933346
x18 = 40.8407044966673
x19 = -75.398223686155
x20 = -78.5398163397448
x21 = 62.8318530717959
x22 = 100.530964914873
x23 = -21.9911485751286
x24 = 47.1238898038469
x25 = 91.106186954104
x26 = -232.477856365645
x27 = 75.398223686155
x28 = 28.2743338823081
x29 = 34.5575191894877
x30 = 6.28318530717959
x31 = 78.5398163397448
x32 = 72.2566310325652
x33 = -6.28318530717959
x34 = 15.707963267949
x35 = 31.4159265358979
x36 = -47.1238898038469
x37 = 25.1327412287183
x38 = 18.8495559215388
x39 = -94.2477796076938
x40 = -3.14159265358979
x41 = -40.8407044966673
x42 = 56.5486677646163
x43 = -25.1327412287183
x44 = 53.4070751110265
x45 = -28.2743338823081
x46 = -9.42477796076938
x47 = 87.9645943005142
x48 = -50.2654824574367
x49 = -100.530964914873
x50 = -43.9822971502571
x51 = 50.2654824574367
x52 = -97.3893722612836
x53 = 69.1150383789755
x54 = 59.6902604182061
x55 = 97.3893722612836
x56 = -62.8318530717959
x57 = -72.2566310325652
x58 = -91.106186954104
x59 = -12.5663706143592
x60 = -69.1150383789755
x61 = 37.6991118430775
x62 = 9.42477796076938
x63 = 65.9734457253857
x64 = -65.9734457253857
x65 = -267.035375555132
x66 = -84.8230016469244
x67 = -34.5575191894877
x68 = 43.9822971502571
x68 = 43.9822971502571