The teacher will be very surprised to see your correct solution 😉
3*tan(x) + 2*cot(x) + 5 = 0
sum
pi - -- - atan(2/3) 4
=
pi -atan(2/3) - -- 4
product
-pi ----*(-atan(2/3)) 4
=
pi*atan(2/3) ------------ 4
pi*atan(2/3)/4
-pi x1 = ---- 4
x2 = -atan(2/3)
x2 = -atan(2/3)
x1 = -79.3252145031423
x2 = -10.0127805643169
x3 = -85.6083998103219
x4 = -25.7207438322659
x5 = 55.7632696012188
x6 = -75.9862262897026
x7 = 27.6863312787606
x8 = -72.8446336361128
x9 = 24.3473430653209
x10 = -7.06858347057703
x11 = 52.621676947629
x12 = -16.2959658714965
x13 = 46.3384916404494
x14 = -22.776546738526
x15 = 36.9137136796801
x16 = -25.9181393921158
x17 = -79.1278189432924
x18 = 55.9606651610687
x19 = -76.1836218495525
x20 = -19.6349540849362
x21 = 68.329640215578
x22 = 96.6039740978861
x23 = -13.3517687777566
x24 = -47.7118924073945
x25 = 203.615519879789
x26 = 99.9429623113258
x27 = 84.2349990433768
x28 = -129.590696960579
x29 = -91.6941895576516
x30 = 33.9695165859402
x31 = 2.55359005004223
x32 = -50.8534850609843
x33 = -201.847327993144
x34 = -29.0597320457056
x35 = -95.0331777710912
x36 = -97.9773748648312
x37 = -69.703040982523
x38 = -19.4375585250863
x39 = -98.174770424681
x40 = 5.69518270363202
x41 = 80.8960108299372
x42 = 18.2615533179912
x43 = 93.6597770041462
x44 = -57.3340659280137
x45 = 8.63937979737193
x46 = 27987.6635526681
x47 = 58.9048622548086
x48 = 40.0553063332699
x49 = -69.9004365423729
x50 = 11.9783680108116
x51 = 90.3207887907066
x52 = -3.72959525713736
x53 = 74.6128255227576
x54 = -60.2782630217536
x55 = -53.9950777145741
x56 = 62.0464549083984
x57 = 159.633222729532
x58 = 62.2438504682483
x59 = -82.2694115968822
x60 = -51.0508806208341
x61 = 99.7455667514759
x62 = 115.453530019425
x63 = 24.5447386251708
x64 = -63.6172512351933
x65 = 71.6686284290177
x66 = 46.5358872002993
x67 = 90.5181843505564
x68 = -32.0039291394455
x69 = 77.9518137361973
x70 = 14.9225651045515
x71 = -44.5702997538047
x72 = 49.6774798538891
x73 = 71.4712328691678
x74 = 2.35619449019234
x75 = 40.2527018931197
x76 = 68.5270357754279
x77 = -6.87118791072715
x78 = -41.6261026600648
x79 = 30.6305283725005
x80 = 52.8190725074789
x81 = -38.2871144466251
x82 = -35.3429173528852
x82 = -35.3429173528852