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cos(4πx/3)=-1/2 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
   /4*pi*x\       
cos|------| = -1/2
   \  3   /       
$$\cos{\left(\frac{4 \pi x}{3} \right)} = - \frac{1}{2}$$
Solución detallada
Tenemos la ecuación
$$\cos{\left(\frac{4 \pi x}{3} \right)} = - \frac{1}{2}$$
es la ecuación trigonométrica más simple
Esta ecuación se reorganiza en
$$\frac{4 \pi x}{3} = \pi n + \operatorname{acos}{\left(- \frac{1}{2} \right)}$$
$$\frac{4 \pi x}{3} = \pi n - \pi + \operatorname{acos}{\left(- \frac{1}{2} \right)}$$
O
$$\frac{4 \pi x}{3} = \pi n + \frac{2 \pi}{3}$$
$$\frac{4 \pi x}{3} = \pi n - \frac{\pi}{3}$$
, donde n es cualquier número entero
Dividamos ambos miembros de la ecuación obtenida en
$$\frac{4 \pi}{3}$$
obtenemos la respuesta:
$$x_{1} = \frac{3 \left(\pi n + \frac{2 \pi}{3}\right)}{4 \pi}$$
$$x_{2} = \frac{3 \left(\pi n - \frac{\pi}{3}\right)}{4 \pi}$$
Gráfica
Suma y producto de raíces [src]
suma
1/2 + 1
$$\frac{1}{2} + 1$$
=
3/2
$$\frac{3}{2}$$
producto
1/2
$$\frac{1}{2}$$
=
1/2
$$\frac{1}{2}$$
1/2
Respuesta rápida [src]
x1 = 1/2
$$x_{1} = \frac{1}{2}$$
x2 = 1
$$x_{2} = 1$$
x2 = 1
Respuesta numérica [src]
x1 = 74.0
x2 = -65.5
x3 = 6.5
x4 = -71.5
x5 = -88.0
x6 = 30.5
x7 = 82.0
x8 = -62.0
x9 = -100.0
x10 = 28.0
x11 = 94.0
x12 = 26.0
x13 = 64.0
x14 = -34.0
x15 = 76.0
x16 = 44.0
x17 = -56.0
x18 = -26.0
x19 = 10.0
x20 = -46.0
x21 = 14.0
x22 = 90.5
x23 = -82.0
x24 = -29.5
x25 = 54.5
x26 = -74.0
x27 = -64.0
x28 = -95.5
x29 = -77.5
x30 = -28.0
x31 = 36.5
x32 = 86.0
x33 = -83.5
x34 = 4.0
x35 = -53.5
x36 = 60.5
x37 = -50.0
x38 = -44.0
x39 = 88.0
x40 = -17.5
x41 = 96.5
x42 = 32.0
x43 = -41.5
x44 = 50.0
x45 = -68.0
x46 = -8.0
x47 = -58.0
x48 = 24.5
x49 = 84.5
x50 = 20.0
x51 = 56.0
x52 = -5.5
x53 = 2.0
x54 = 46.0
x55 = 16.0
x56 = -38.0
x57 = -70.0
x58 = 80.0
x59 = -35.5
x60 = 52.0
x61 = 12.5
x62 = 78.5
x63 = 100.0
x64 = 72.5
x65 = -47.5
x66 = 40.0
x67 = -32.0
x68 = -76.0
x69 = -94.0
x70 = -89.5
x71 = 92.0
x72 = 0.5
x73 = -40.0
x74 = 68.0
x75 = -20.0
x76 = -2.0
x77 = 34.0
x78 = -11.5
x79 = -52.0
x80 = 58.0
x81 = -16.0
x82 = -92.0
x83 = -4.0
x84 = 42.5
x85 = -98.0
x86 = 38.0
x87 = -22.0
x88 = 62.0
x89 = -86.0
x90 = -10.0
x91 = -80.0
x92 = -14.0
x93 = -23.5
x94 = 66.5
x95 = 70.0
x96 = -59.5
x97 = 98.0
x98 = 48.5
x99 = 22.0
x100 = 8.0
x101 = 18.5
x101 = 18.5