The teacher will be very surprised to see your correct solution 😉
x*sin(x) + cos(x) = 0
x1 = -56.5309801938186
x2 = -37.672573565113
x3 = 59.6735041304405
x4 = 72.2427897046973
x5 = -94.2371684817036
x6 = 34.5285657554621
x7 = -31.3840740178899
x8 = -75.3849592185347
x9 = 12.4864543952238
x10 = 62.8159348889734
x11 = 100.521017074687
x12 = 94.2371684817036
x13 = -15.644128370333
x14 = -18.7964043662102
x15 = 6.12125046689807
x16 = -6.12125046689807
x17 = -72.2427897046973
x18 = 65.9582857893902
x19 = -97.3791034786112
x20 = 56.5309801938186
x21 = 37.672573565113
x22 = -53.3883466217256
x23 = -50.2455828375744
x24 = 40.8162093266346
x25 = -34.5285657554621
x26 = 78.5270825679419
x27 = -69.100567727981
x28 = 69.100567727981
x29 = 31.3840740178899
x30 = 25.0929104121121
x31 = -65.9582857893902
x32 = -113.088493127061
x33 = -2.79838604578389
x34 = 15.644128370333
x35 = 87.9532251106725
x36 = -81.6691650818489
x37 = -43.9595528888955
x38 = 75.3849592185347
x39 = 28.2389365752603
x40 = -91.0952098694071
x41 = 50.2455828375744
x42 = 81.6691650818489
x43 = 18.7964043662102
x44 = -84.811211299318
x45 = -59.6735041304405
x46 = -40.8162093266346
x47 = 91.0952098694071
x48 = -25.0929104121121
x49 = -78.5270825679419
x50 = -62.8159348889734
x51 = 43.9595528888955
x52 = 47.1026627703624
x53 = 97.3791034786112
x54 = -28.2389365752603
x55 = 9.31786646179107
x56 = -47.1026627703624
x57 = 84.811211299318
x58 = 2.79838604578389
x59 = -9.31786646179107
x60 = -100.521017074687
x61 = 53.3883466217256
x62 = 21.945612879981
x63 = -12.4864543952238
x64 = -87.9532251106725
x65 = -21.945612879981
x65 = -21.945612879981