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cos^2(x/3)-sin^2(x/3)=1/2 la ecuación

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Solución numérica:

Buscar la solución numérica en el intervalo [, ]

Solución

Ha introducido [src]
   2/x\      2/x\      
cos |-| - sin |-| = 1/2
    \3/       \3/      
$$- \sin^{2}{\left(\frac{x}{3} \right)} + \cos^{2}{\left(\frac{x}{3} \right)} = \frac{1}{2}$$
Gráfica
Respuesta rápida [src]
     -5*pi
x1 = -----
       2  
$$x_{1} = - \frac{5 \pi}{2}$$
     -pi 
x2 = ----
      2  
$$x_{2} = - \frac{\pi}{2}$$
     pi
x3 = --
     2 
$$x_{3} = \frac{\pi}{2}$$
     5*pi
x4 = ----
      2  
$$x_{4} = \frac{5 \pi}{2}$$
x4 = 5*pi/2
Suma y producto de raíces [src]
suma
  5*pi   pi   pi   5*pi
- ---- - -- + -- + ----
   2     2    2     2  
$$\left(\left(- \frac{5 \pi}{2} - \frac{\pi}{2}\right) + \frac{\pi}{2}\right) + \frac{5 \pi}{2}$$
=
0
$$0$$
producto
-5*pi -pi  pi 5*pi
-----*----*--*----
  2    2   2   2  
$$\frac{5 \pi}{2} \frac{\pi}{2} \cdot - \frac{5 \pi}{2} \left(- \frac{\pi}{2}\right)$$
=
     4
25*pi 
------
  16  
$$\frac{25 \pi^{4}}{16}$$
25*pi^4/16
Respuesta numérica [src]
x1 = 102.101761241668
x2 = -1.5707963267949
x3 = -64.4026493985908
x4 = 76.9690200129499
x5 = -48.6946861306418
x6 = -58.1194640914112
x7 = -29.845130209103
x8 = -86.3937979737193
x9 = -36.1283155162826
x10 = 1.5707963267949
x11 = -39.2699081698724
x12 = 73.8274273593601
x13 = -92.6769832808989
x14 = -102.101761241668
x15 = 67.5442420521806
x16 = -10.9955742875643
x17 = 36.1283155162826
x18 = 20.4203522483337
x19 = -26.7035375555132
x20 = 10.9955742875643
x21 = 29972.3647115734
x22 = 45.553093477052
x23 = 83.2522053201295
x24 = 95.8185759344887
x25 = -67.5442420521806
x26 = -54.9778714378214
x27 = -17.2787595947439
x28 = 26.7035375555132
x29 = 17.2787595947439
x30 = 54.9778714378214
x31 = -7.85398163397448
x32 = 48.6946861306418
x33 = 92.6769832808989
x34 = 58.1194640914112
x35 = -73.8274273593601
x36 = 190.066355542182
x37 = -76.9690200129499
x38 = 86.3937979737193
x39 = -1327.32289614169
x40 = 39.2699081698724
x41 = -20.4203522483337
x42 = 64.4026493985908
x43 = -83.2522053201295
x44 = 7.85398163397448
x45 = -95.8185759344887
x46 = 29.845130209103
x47 = -45.553093477052
x47 = -45.553093477052