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cos((pi*(4x+60))/4)=-(sqrt(2)/2) la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
                        ___ 
   /pi*(4*x + 60)\   -\/ 2  
cos|-------------| = -------
   \      4      /      2   
$$\cos{\left(\frac{\pi \left(4 x + 60\right)}{4} \right)} = - \frac{\sqrt{2}}{2}$$
Solución detallada
Tenemos la ecuación
$$\cos{\left(\frac{\pi \left(4 x + 60\right)}{4} \right)} = - \frac{\sqrt{2}}{2}$$
es la ecuación trigonométrica más simple
Dividamos ambos miembros de la ecuación en -1

La ecuación se convierte en
$$\cos{\left(\pi x \right)} = \frac{\sqrt{2}}{2}$$
Esta ecuación se reorganiza en
$$\pi x = \pi n + \operatorname{acos}{\left(\frac{\sqrt{2}}{2} \right)}$$
$$\pi x = \pi n - \pi + \operatorname{acos}{\left(\frac{\sqrt{2}}{2} \right)}$$
O
$$\pi x = \pi n + \frac{\pi}{4}$$
$$\pi x = \pi n - \frac{3 \pi}{4}$$
, donde n es cualquier número entero
Dividamos ambos miembros de la ecuación obtenida en
$$\pi$$
obtenemos la respuesta:
$$x_{1} = \frac{\pi n + \frac{\pi}{4}}{\pi}$$
$$x_{2} = \frac{\pi n - \frac{3 \pi}{4}}{\pi}$$
Gráfica
Respuesta rápida [src]
x1 = 1/4
$$x_{1} = \frac{1}{4}$$
x2 = 7/4
$$x_{2} = \frac{7}{4}$$
x2 = 7/4
Suma y producto de raíces [src]
suma
1/4 + 7/4
$$\frac{1}{4} + \frac{7}{4}$$
=
2
$$2$$
producto
 7 
---
4*4
$$\frac{7}{4 \cdot 4}$$
=
7/16
$$\frac{7}{16}$$
7/16
Respuesta numérica [src]
x1 = 16.25
x2 = 84.25
x3 = -79.75
x4 = -35.75
x5 = 54.25
x6 = -73.75
x7 = 6.25
x8 = -19.75
x9 = 74.25
x10 = -23.75
x11 = -15.75
x12 = 14.25
x13 = 58.25
x14 = 88.25
x15 = -7.75
x16 = -99.75
x17 = -93.75
x18 = -9.75
x19 = -55.75
x20 = -5.75
x21 = -47.75
x22 = 32.25
x23 = -83.75
x24 = 52.25
x25 = 36.25
x26 = -43.75
x27 = 78.25
x28 = -25.75
x29 = -59.75
x30 = 34.25
x31 = 30.25
x32 = 94.25
x33 = -11.75
x34 = 68.25
x35 = -49.75
x36 = -65.75
x37 = 96.25
x38 = 50.25
x39 = 82.25
x40 = -51.75
x41 = -31.75
x42 = 38.25
x43 = 24.25
x44 = -77.75
x45 = 66.25
x46 = -17.75
x47 = 80.25
x48 = -41.75
x49 = -45.75
x50 = -29.75
x51 = -75.75
x52 = 48.25
x53 = -63.75
x54 = 22.25
x55 = -27.75
x56 = -57.75
x57 = -39.75
x58 = 92.25
x59 = -71.75
x60 = -69.75
x61 = 70.25
x62 = 42.25
x63 = 12.25
x64 = 72.25
x65 = 90.25
x66 = 60.25
x67 = -53.75
x68 = 26.25
x69 = 4.25
x70 = 62.25
x71 = 98.25
x72 = 0.25
x73 = -67.75
x74 = 10.25
x75 = -33.75
x76 = 64.25
x77 = -1.75
x78 = 18.25
x79 = 86.25
x80 = 56.25
x81 = -13.75
x82 = -37.75
x83 = 8.25
x84 = 40.25
x85 = -97.75
x86 = -89.75
x87 = 2.25
x88 = -3.75
x89 = 28.25
x90 = 46.25
x91 = -81.75
x92 = 20.25
x93 = -95.75
x94 = -61.75
x95 = -85.75
x96 = 76.25
x97 = -87.75
x98 = -91.75
x99 = 44.25
x100 = 100.25
x101 = -21.75
x101 = -21.75