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2*sin(x)-sin(x)^(2)=cos(x)^(2) la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
              2         2   
2*sin(x) - sin (x) = cos (x)
$$- \sin^{2}{\left(x \right)} + 2 \sin{\left(x \right)} = \cos^{2}{\left(x \right)}$$
Solución detallada
Tenemos la ecuación
$$- \sin^{2}{\left(x \right)} + 2 \sin{\left(x \right)} = \cos^{2}{\left(x \right)}$$
cambiamos
$$2 \sin{\left(x \right)} - 1 = 0$$
$$2 \sin{\left(x \right)} - 1 = 0$$
Sustituimos
$$w = \sin{\left(x \right)}$$
Transportamos los términos libres (sin w)
del miembro izquierdo al derecho, obtenemos:
$$2 w = 1$$
Dividamos ambos miembros de la ecuación en 2
w = 1 / (2)

Obtenemos la respuesta: w = 1/2
hacemos cambio inverso
$$\sin{\left(x \right)} = w$$
Tenemos la ecuación
$$\sin{\left(x \right)} = w$$
es la ecuación trigonométrica más simple
Esta ecuación se reorganiza en
$$x = 2 \pi n + \operatorname{asin}{\left(w \right)}$$
$$x = 2 \pi n - \operatorname{asin}{\left(w \right)} + \pi$$
O
$$x = 2 \pi n + \operatorname{asin}{\left(w \right)}$$
$$x = 2 \pi n - \operatorname{asin}{\left(w \right)} + \pi$$
, donde n es cualquier número entero
sustituimos w:
$$x_{1} = 2 \pi n + \operatorname{asin}{\left(w_{1} \right)}$$
$$x_{1} = 2 \pi n + \operatorname{asin}{\left(\frac{1}{2} \right)}$$
$$x_{1} = 2 \pi n + \frac{\pi}{6}$$
$$x_{2} = 2 \pi n - \operatorname{asin}{\left(w_{1} \right)} + \pi$$
$$x_{2} = 2 \pi n - \operatorname{asin}{\left(\frac{1}{2} \right)} + \pi$$
$$x_{2} = 2 \pi n + \frac{5 \pi}{6}$$
Gráfica
Suma y producto de raíces [src]
suma
pi   5*pi
-- + ----
6     6  
$$\frac{\pi}{6} + \frac{5 \pi}{6}$$
=
pi
$$\pi$$
producto
pi 5*pi
--*----
6   6  
$$\frac{\pi}{6} \frac{5 \pi}{6}$$
=
    2
5*pi 
-----
  36 
$$\frac{5 \pi^{2}}{36}$$
5*pi^2/36
Respuesta rápida [src]
     pi
x1 = --
     6 
$$x_{1} = \frac{\pi}{6}$$
     5*pi
x2 = ----
      6  
$$x_{2} = \frac{5 \pi}{6}$$
x2 = 5*pi/6
Respuesta numérica [src]
x1 = -47.6474885794452
x2 = 21.4675497995303
x3 = -93.7241808320955
x4 = 69.6386371545737
x5 = 52.8834763354282
x6 = -79.0634151153431
x7 = -66.497044500984
x8 = -72.7802298081635
x9 = 15.1843644923507
x10 = -30.8923277602996
x11 = 57.0722665402146
x12 = 101.054563690472
x13 = -24.60914245312
x14 = -74.8746249105567
x15 = 84.2994028713261
x16 = 63.3554518473942
x17 = 90.5825881785057
x18 = 78.0162175641465
x19 = 2.61799387799149
x20 = -41.3643032722656
x21 = -43.4586983746588
x22 = -37.1755130674792
x23 = 134.564885328763
x24 = 138.753675533549
x25 = -22.5147473507269
x26 = 0.523598775598299
x27 = 96.8657734856853
x28 = 38.2227106186758
x29 = -68.5914396033772
x30 = 44.5058959258554
x31 = -60.2138591938044
x32 = 94.7713783832921
x33 = -53.9306738866248
x34 = 50.789081233035
x35 = 27.7507351067098
x36 = -5.75958653158129
x37 = -87.4409955249159
x38 = 65.4498469497874
x39 = -16.2315620435473
x40 = -56.025068989018
x41 = 19.3731546971371
x42 = 13.0899693899575
x43 = -9.94837673636768
x44 = -12.0427718387609
x45 = -3.66519142918809
x46 = 6.80678408277789
x47 = -81.1578102177363
x48 = -97.9129710368819
x49 = -28.7979326579064
x50 = 88.4881930761125
x51 = -18.3259571459405
x52 = 31.9395253114962
x53 = 46.6002910282486
x54 = 40.317105721069
x55 = -627.79493194236
x56 = 59.1666616426078
x57 = 82.2050077689329
x58 = 8.90117918517108
x59 = 75.9218224617533
x60 = -91.6297857297023
x61 = 34.0339204138894
x62 = 71.733032256967
x63 = -85.3466004225227
x64 = -100.007366139275
x65 = -2650.98060085419
x66 = -62.3082542961976
x67 = -49.7418836818384
x68 = 25.6563400043166
x69 = -35.081117965086
x70 = -4454.25478401473
x70 = -4454.25478401473