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cos(x/2)+1=0 la ecuación

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Solución numérica:

Buscar la solución numérica en el intervalo [, ]

Solución

Ha introducido [src]
   /x\        
cos|-| + 1 = 0
   \2/        
$$\cos{\left(\frac{x}{2} \right)} + 1 = 0$$
Solución detallada
Tenemos la ecuación
$$\cos{\left(\frac{x}{2} \right)} + 1 = 0$$
es la ecuación trigonométrica más simple
Transportemos 1 al miembro derecho de la ecuación

cambiando el signo de 1

Obtenemos:
$$\cos{\left(\frac{x}{2} \right)} = -1$$
Esta ecuación se reorganiza en
$$\frac{x}{2} = \pi n + \operatorname{acos}{\left(-1 \right)}$$
$$\frac{x}{2} = \pi n - \pi + \operatorname{acos}{\left(-1 \right)}$$
O
$$\frac{x}{2} = \pi n + \pi$$
$$\frac{x}{2} = \pi n$$
, donde n es cualquier número entero
Dividamos ambos miembros de la ecuación obtenida en
$$\frac{1}{2}$$
obtenemos la respuesta:
$$x_{1} = 2 \pi n + 2 \pi$$
$$x_{2} = 2 \pi n$$
Gráfica
Respuesta rápida [src]
x1 = 2*pi
$$x_{1} = 2 \pi$$
x1 = 2*pi
Suma y producto de raíces [src]
suma
2*pi
$$2 \pi$$
=
2*pi
$$2 \pi$$
producto
2*pi
$$2 \pi$$
=
2*pi
$$2 \pi$$
2*pi
Respuesta numérica [src]
x1 = -31.4159267991785
x2 = 69.115037955532
x3 = -56.5486677946696
x4 = -69.1150393645777
x5 = 69.1150373651011
x6 = -69.115038701061
x7 = 6.28318608026041
x8 = 18.8495564877336
x9 = 94.2477803922665
x10 = 56.5486668446775
x11 = -18.8495543136467
x12 = 6.28318528419795
x13 = 18.8495556154405
x14 = -81.6814090382823
x15 = -56.5486687887842
x16 = -43.9822963521153
x17 = 81.6814094388795
x18 = -94.2477794433785
x19 = 56.5486672894687
x20 = -420.973417050673
x21 = 69.1150397628024
x22 = 43.9822979229286
x23 = 6.28318624191326
x24 = -69.1150378269834
x25 = 94.2477788210844
x26 = -6.28318627375063
x27 = 43.982297169474
x28 = 69.115038835587
x29 = 81.681409932803
x30 = 18.8495569537229
x31 = -6.28318500560576
x32 = -43.9822980632848
x33 = -18.8495554800568
x34 = -56.548667456373
x35 = -6.28318437561383
x36 = -18.8495569383691
x37 = -31.4159274639505
x38 = 43.9822980146158
x39 = -18.8495563601837
x40 = -6.28318480992034
x41 = -18.8495548993085
x42 = 31.4159259869291
x43 = 43.9822963919738
x44 = 6.28318454684724
x45 = 56.5486681672153
x46 = 94.2477787666659
x47 = 18.8495554920234
x48 = 18.8495561010751
x49 = -94.2477805989545
x50 = 94.2477796093523
x51 = 56.5486675992574
x52 = -6.28318512498487
x53 = 31.415926404003
x54 = -6.28318597231491
x55 = 69.1150368714384
x56 = -94.2477786842917
x57 = -31.4159258676764
x58 = 56.548668769019
x59 = -69.1150405916551
x60 = 69.1150394039813
x61 = -31.4159267183799
x62 = 81.6814069775521
x63 = 56.5486684458067
x64 = -43.982296295854
x65 = -81.6814097251289
x66 = -81.6814098544517
x67 = 43.9822962232996
x68 = -18.8495572113627
x69 = 6.28318445599649
x70 = 31.4159275256971
x71 = -69.1150380827831
x72 = 31.4159268602638
x73 = -81.6814082319334
x74 = 81.6814091930517
x75 = 81.6814083413212
x76 = 973.893720162307
x77 = -56.5486667805662
x78 = 94.2477805288104
x79 = 81.6814079898679
x80 = -31.4159269573538
x81 = -94.2477790629797
x82 = -31.4159255258029
x83 = -6.28318630492991
x84 = -69.115037346238
x85 = -43.9822971745293
x86 = -81.68140804614
x87 = -56.5486683277755
x88 = 31.4159255107699
x89 = 18.8495549415754
x90 = -94.2477802857943
x91 = -43.9822979202134
x91 = -43.9822979202134