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(cosx*cos2x)/(tgx-1)=0 la ecuación

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Solución numérica:

Buscar la solución numérica en el intervalo [, ]

Solución

Ha introducido [src]
cos(x)*cos(2*x)    
--------------- = 0
   tan(x) - 1      
$$\frac{\cos{\left(x \right)} \cos{\left(2 x \right)}}{\tan{\left(x \right)} - 1} = 0$$
Solución detallada
Tenemos la ecuación
$$\frac{\cos{\left(x \right)} \cos{\left(2 x \right)}}{\tan{\left(x \right)} - 1} = 0$$
cambiamos
$$\frac{\cos{\left(x \right)} \cos{\left(2 x \right)}}{\tan{\left(x \right)} - 1} = 0$$
$$\frac{\cos{\left(x \right)} \cos{\left(2 x \right)}}{\tan{\left(x \right)} - 1} = 0$$
Sustituimos
$$w = \tan{\left(x \right)}$$
Tenemos la ecuación:
$$\frac{\cos{\left(x \right)} \cos{\left(2 x \right)}}{w - 1} = 0$$
Multipliquemos las dos partes de la ecuación por el denominador -1 + w
obtendremos:
$$\cos{\left(x \right)} \cos{\left(2 x \right)} = 0$$
Abrimos los paréntesis en el miembro izquierdo de la ecuación
cosxcos2*x = 0

Esta ecuación no tiene soluciones
hacemos cambio inverso
$$\tan{\left(x \right)} = w$$
Tenemos la ecuación
$$\tan{\left(x \right)} = w$$
es la ecuación trigonométrica más simple
Esta ecuación se reorganiza en
$$x = \pi n + \operatorname{atan}{\left(w \right)}$$
O
$$x = \pi n + \operatorname{atan}{\left(w \right)}$$
, donde n es cualquier número entero
sustituimos w:
Gráfica
Respuesta rápida [src]
     -pi 
x1 = ----
      2  
$$x_{1} = - \frac{\pi}{2}$$
     -pi 
x2 = ----
      4  
$$x_{2} = - \frac{\pi}{4}$$
     pi
x3 = --
     2 
$$x_{3} = \frac{\pi}{2}$$
x3 = pi/2
Suma y producto de raíces [src]
suma
  pi   pi   pi
- -- - -- + --
  2    4    2 
$$\left(- \frac{\pi}{2} - \frac{\pi}{4}\right) + \frac{\pi}{2}$$
=
-pi 
----
 4  
$$- \frac{\pi}{4}$$
producto
-pi  -pi  pi
----*----*--
 2    4   2 
$$\frac{\pi}{2} \cdot - \frac{\pi}{2} \left(- \frac{\pi}{4}\right)$$
=
  3
pi 
---
 16
$$\frac{\pi^{3}}{16}$$
pi^3/16
Respuesta numérica [src]
x1 = -45.5530934806072
x2 = 76.969019721388
x3 = -39.2699084505204
x4 = 26.7035372849367
x5 = 2.35619449019234
x6 = 5.49778714378214
x7 = -67.5442419640524
x8 = 99.7455667514759
x9 = 29.8451302755006
x10 = -80.1106126046794
x11 = 33.7721210260903
x12 = -54.1924732744239
x13 = -73.82742729288
x14 = 95.8185759987487
x15 = -32.2013246992954
x16 = -54.9778716942414
x17 = 42.4115007347935
x18 = 73.8274274248159
x19 = -1.5707964479897
x20 = 27.4889357189107
x21 = 42.4115007136177
x22 = -41.6261026600648
x23 = -58.1194640279197
x24 = 80.1106129308404
x25 = 62.0464549083984
x26 = 51.8362788503823
x27 = -19.6349540849362
x28 = -82.4668071567321
x29 = 24.3473430653209
x30 = 7.85398170020814
x31 = -95.8185758770624
x32 = 48.6946858636663
x33 = 64.402649533351
x34 = 10.9955740105265
x35 = -51.8362787081158
x36 = -32.9867231267594
x37 = 20.4203520500775
x38 = 98.9601682927976
x39 = 77.7544181763474
x40 = 54.9778711505109
x41 = 46.3384916404494
x42 = -3.92699081698724
x43 = 92.6769830214649
x44 = -83.2522056068344
x45 = -89.5353907708193
x46 = -98.174770424681
x47 = 4.71238870632604
x48 = -14.1371668754694
x49 = 93.4623814442964
x50 = -45.5530936094725
x51 = -89.5353904726395
x52 = 18.0641577581413
x53 = 11.7809724509617
x54 = 32.9867225802081
x55 = 55.7632696012188
x56 = -1.5707965129142
x57 = -63.6172512351933
x58 = -17.2787598721612
x59 = -47.9092879672443
x60 = -70.6858344814107
x61 = 61.2610568664151
x62 = -61.2610570287465
x63 = -36.1283154515152
x64 = 40.0553063332699
x65 = -76.9690202608563
x66 = -83.2522056315082
x67 = -25.9181393921158
x68 = -67.5442421901637
x69 = -10.2101761241668
x70 = -91.8915851175014
x71 = -92.6769829893905
x72 = -69.9004365423729
x73 = 64.4026492944653
x74 = -10.995574558482
x75 = -7.85398153807277
x76 = 90.3207887907066
x77 = 20.420352132799
x78 = -98.9601688265242
x79 = 36.1283151629189
x80 = -60.4756585816035
x81 = 71.4712328691678
x82 = 86.3937978753411
x83 = -38.484510006475
x84 = -23.5619450287473
x85 = 49.4800842940392
x86 = -76.1836218495525
x87 = 70.6858344425104
x88 = -29.845130122887
x89 = -16.4933614313464
x90 = -23.5619450070415
x91 = 68.329640215578
x92 = 14.1371670407494
x93 = 86.3937982801877
x94 = 84.037603483527
x94 = 84.037603483527