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5*sin(x/6)+cos(x/3)+3=0 la ecuación

El profesor se sorprenderá mucho al ver tu solución correcta😉

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Solución numérica:

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Solución

Ha introducido [src]
     /x\      /x\        
5*sin|-| + cos|-| + 3 = 0
     \6/      \3/        
$$\left(5 \sin{\left(\frac{x}{6} \right)} + \cos{\left(\frac{x}{3} \right)}\right) + 3 = 0$$
Gráfica
Respuesta numérica [src]
x1 = 108.950163642192
x2 = 60.6958396516565
x3 = -192.642731102428
x4 = 173.793175180889
x5 = -79.5453955731953
x6 = -1399.01431008091
x7 = 249.191398867044
x8 = -14.7023840344985
x9 = -2869.27967196093
x10 = -4.14717188704021
x11 = 22.996727808579
x12 = -52.4014958775761
x13 = 33.5519399560373
x14 = -41.8462837301177
x15 = 136.094063337812
x16 = 98.394951494734
x17 = -429.392614308351
x18 = -90.1006077206536
x19 = 561.339505759123
x20 = -268.040954788583
x21 = 71.2510517991148
x22 = 286.890510710122
x22 = 286.890510710122