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sin(2*x)=-1/2

sin(2*x)=-1/2 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
sin(2*x) = -1/2
$$\sin{\left(2 x \right)} = - \frac{1}{2}$$
Solución detallada
Tenemos la ecuación
$$\sin{\left(2 x \right)} = - \frac{1}{2}$$
es la ecuación trigonométrica más simple
Esta ecuación se reorganiza en
$$2 x = 2 \pi n + \operatorname{asin}{\left(- \frac{1}{2} \right)}$$
$$2 x = 2 \pi n - \operatorname{asin}{\left(- \frac{1}{2} \right)} + \pi$$
O
$$2 x = 2 \pi n - \frac{\pi}{6}$$
$$2 x = 2 \pi n + \frac{7 \pi}{6}$$
, donde n es cualquier número entero
Dividamos ambos miembros de la ecuación obtenida en
$$2$$
obtenemos la respuesta:
$$x_{1} = \pi n - \frac{\pi}{12}$$
$$x_{2} = \pi n + \frac{7 \pi}{12}$$
Gráfica
Respuesta rápida [src]
     -pi 
x1 = ----
      12 
$$x_{1} = - \frac{\pi}{12}$$
     7*pi
x2 = ----
      12 
$$x_{2} = \frac{7 \pi}{12}$$
x2 = 7*pi/12
Suma y producto de raíces [src]
suma
  pi   7*pi
- -- + ----
  12    12 
$$- \frac{\pi}{12} + \frac{7 \pi}{12}$$
=
pi
--
2 
$$\frac{\pi}{2}$$
producto
-pi  7*pi
----*----
 12   12 
$$- \frac{\pi}{12} \frac{7 \pi}{12}$$
=
     2
-7*pi 
------
 144  
$$- \frac{7 \pi^{2}}{144}$$
-7*pi^2/144
Respuesta numérica [src]
x1 = 56.2868683768171
x2 = -66.2352451131848
x3 = 127.496301858186
x4 = -94.5095789954929
x5 = 67.8060414399797
x6 = -15.9697626557481
x7 = -7.59218224617533
x8 = -53.6688744988256
x9 = -17.0169602069447
x10 = -0.261799387799149
x11 = -28.5361332701073
x12 = 84.5612022591253
x13 = 42.6733002112614
x14 = -50.5272818452358
x15 = -1.30899693899575
x16 = -23.3001455141243
x17 = -6.54498469497874
x18 = -81.9432083811338
x19 = -31.6777259236971
x20 = 74.0892267471593
x21 = -13.8753675533549
x22 = 90.8443875663049
x23 = 23.8237442897226
x24 = 18.5877565337396
x25 = 86.6555973615185
x26 = 100.269165527074
x27 = 20.6821516361328
x28 = -1926.05809603834
x29 = 45.8148928648512
x30 = -44.2440965380563
x31 = -88.2263936883134
x32 = -75.6600230739542
x33 = -64.1408500107916
x34 = -67.2824426643814
x35 = -59.9520598060052
x36 = -37.9609112308767
x37 = -51.5744793964324
x38 = -9.68657734856853
x39 = 43.720497762458
x40 = 89.7971900151083
x41 = 78.2780169519457
x42 = 1.83259571459405
x43 = 80.3724120543389
x44 = 96.0803753222878
x45 = 71.9948316447661
x46 = 12.30457122656
x47 = 28.012534494509
x48 = 50.0036830696375
x49 = -73.565627971561
x50 = 6.02138591938044
x51 = -79.8488132787406
x52 = 8.11578102177363
x53 = 37.4373124552784
x54 = 65.7116463375865
x55 = -89.27359123951
x56 = 93.9859802198946
x57 = -22.2529479629277
x58 = -97.6511716490827
x59 = -20.1585528605345
x60 = -72.5184304203644
x61 = 34.2957198016886
x62 = -57.857664703612
x63 = 52.0980781720307
x64 = 21.7293491873294
x65 = -42.1497014356631
x66 = 81.4196096055355
x67 = 15.4461638801498
x68 = 30.1069295969022
x69 = -91.3679863419031
x70 = 87.7027949127151
x71 = 36.3901149040818
x72 = 59.4284610304069
x73 = -95.5567765466895
x74 = -45.2912940892529
x75 = -35.8665161284835
x76 = 40.5789051088682
x77 = -29.5833308213039
x78 = 14.3989663289532
x79 = 58.3812634792103
x80 = 64.6644487863899
x81 = -86.1319985859202
x82 = 62.5700536839967
x82 = 62.5700536839967
Gráfico
sin(2*x)=-1/2 la ecuación