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(-2)*cos(3*x+pi/4)=-sqrt(3) la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
      /      pi\      ___
-2*cos|3*x + --| = -\/ 3 
      \      4 /         
$$- 2 \cos{\left(3 x + \frac{\pi}{4} \right)} = - \sqrt{3}$$
Solución detallada
Tenemos la ecuación
$$- 2 \cos{\left(3 x + \frac{\pi}{4} \right)} = - \sqrt{3}$$
es la ecuación trigonométrica más simple
Dividamos ambos miembros de la ecuación en -2

La ecuación se convierte en
$$\cos{\left(3 x + \frac{\pi}{4} \right)} = \frac{\sqrt{3}}{2}$$
Esta ecuación se reorganiza en
$$3 x + \frac{\pi}{4} = \pi n + \operatorname{acos}{\left(\frac{\sqrt{3}}{2} \right)}$$
$$3 x + \frac{\pi}{4} = \pi n - \pi + \operatorname{acos}{\left(\frac{\sqrt{3}}{2} \right)}$$
O
$$3 x + \frac{\pi}{4} = \pi n + \frac{\pi}{6}$$
$$3 x + \frac{\pi}{4} = \pi n - \frac{5 \pi}{6}$$
, donde n es cualquier número entero
Transportemos
$$\frac{\pi}{4}$$
al miembro derecho de la ecuación
con el signo opuesto, en total:
$$3 x = \pi n - \frac{\pi}{12}$$
$$3 x = \pi n - \frac{13 \pi}{12}$$
Dividamos ambos miembros de la ecuación obtenida en
$$3$$
obtenemos la respuesta:
$$x_{1} = \frac{\pi n}{3} - \frac{\pi}{36}$$
$$x_{2} = \frac{\pi n}{3} - \frac{13 \pi}{36}$$
Gráfica
Respuesta rápida [src]
     -pi 
x1 = ----
      36 
$$x_{1} = - \frac{\pi}{36}$$
     19*pi
x2 = -----
       36 
$$x_{2} = \frac{19 \pi}{36}$$
x2 = 19*pi/36
Suma y producto de raíces [src]
suma
  pi   19*pi
- -- + -----
  36     36 
$$- \frac{\pi}{36} + \frac{19 \pi}{36}$$
=
pi
--
2 
$$\frac{\pi}{2}$$
producto
-pi  19*pi
----*-----
 36    36 
$$- \frac{\pi}{36} \frac{19 \pi}{36}$$
=
      2
-19*pi 
-------
  1296 
$$- \frac{19 \pi^{2}}{1296}$$
-19*pi^2/1296
Respuesta numérica [src]
x1 = -54.8906049752217
x2 = -2.18166156499291
x3 = -23.4746784393237
x4 = -80.02334620394
x5 = 4.10152374218667
x6 = 12.1300383013606
x7 = -48.2583538176432
x8 = 54.0179403492245
x9 = -16.8424272817453
x10 = -108.995811787046
x11 = -63.2681853847944
x12 = 96.2549082474873
x13 = 85.7829327355213
x14 = 45.9894257900506
x15 = 48.0838208924438
x16 = -27.6634686441101
x17 = 68.6787060659769
x18 = 62.3955207587973
x19 = -35.691983203284
x20 = 100.094632601875
x21 = -92.2406509679003
x22 = -31.8522588488965
x23 = 41.4515697348653
x24 = 43.8950306876574
x25 = -83.8630705583275
x26 = -21.3802833369305
x27 = -94.3350460702935
x28 = 75.3109572235553
x29 = -8.4648468721725
x30 = -77.9289511015468
x31 = 25.0454747661186
x32 = -33.9466539512897
x33 = -73.7401608967604
x34 = -85.9574656607207
x35 = -69.551370691974
x36 = -41.9751685104636
x37 = 89.9717229403077
x38 = 27.1398698685118
x39 = 41.8006355852642
x40 = 58.2067305540109
x41 = -44.0695636128568
x42 = 14.2244334037538
x43 = -81.7686754559343
x44 = 10.0356431989674
x45 = -0.0872664625997165
x46 = 52.2726110972302
x47 = 98.0002374994816
x48 = -4.27605666738611
x49 = -39.8807734080704
x50 = 83.6885376331281
x51 = 6.19591884457987
x52 = -67.4569755895808
x53 = 35.5174502780846
x54 = -65.3625804871876
x55 = -37.7863783056772
x56 = 16.318828506147
x57 = 20.5076187109334
x58 = -50.3527489200364
x59 = 24.6964089157198
x60 = 77.0562864755497
x61 = 66.5843109635837
x62 = 18.4132236085402
x63 = -25.5690735417169
x64 = 64.4899158611905
x65 = 71.1221670187689
x66 = 22.6020138133266
x67 = 33.0739893252925
x68 = -6.3704517697793
x69 = -19.2858882345373
x70 = 60.3011256564041
x71 = -29.7578637465033
x72 = -75.8345559991536
x73 = -96.4294411726867
x74 = -98.8729021254788
x75 = -60.8247244320024
x76 = -10.9083078249646
x77 = 81.5941425307349
x78 = 50.178215994837
x79 = 87.8773278379145
x80 = 2.00712863979348
x81 = 56.1123354516177
x82 = -90.1462558655071
x83 = 39.706240482871
x84 = -71.6457657943672
x85 = 8.29031394697306
x86 = -88.0518607631139
x87 = 92.0661180427009
x88 = 37.6118453804778
x89 = 20.8566845613322
x90 = 79.4997474283417
x91 = -52.4471440224296
x92 = -50.7018147704353
x93 = 94.1605131450941
x94 = -46.16395871525
x94 = -46.16395871525