Sr Examen

Otras calculadoras

cos(pi/2(2x+5))=1+(y-1)^8 la ecuación

El profesor se sorprenderá mucho al ver tu solución correcta😉

v

Solución numérica:

Buscar la solución numérica en el intervalo [, ]

Solución

Ha introducido [src]
   /pi          \              8
cos|--*(2*x + 5)| = 1 + (y - 1) 
   \2           /               
cos(π2(2x+5))=(y1)8+1\cos{\left(\frac{\pi}{2} \left(2 x + 5\right) \right)} = \left(y - 1\right)^{8} + 1
Solución detallada
Tenemos la ecuación
cos(π2(2x+5))=(y1)8+1\cos{\left(\frac{\pi}{2} \left(2 x + 5\right) \right)} = \left(y - 1\right)^{8} + 1
es la ecuación trigonométrica más simple
Dividamos ambos miembros de la ecuación en -1

La ecuación se convierte en
sin(πx)=y8+8y728y6+56y570y4+56y328y2+8y2\sin{\left(\pi x \right)} = - y^{8} + 8 y^{7} - 28 y^{6} + 56 y^{5} - 70 y^{4} + 56 y^{3} - 28 y^{2} + 8 y - 2
Esta ecuación se reorganiza en
πx=2πn+asin(y8+8y728y6+56y570y4+56y328y2+8y2)\pi x = 2 \pi n + \operatorname{asin}{\left(- y^{8} + 8 y^{7} - 28 y^{6} + 56 y^{5} - 70 y^{4} + 56 y^{3} - 28 y^{2} + 8 y - 2 \right)}
πx=2πnasin(y8+8y728y6+56y570y4+56y328y2+8y2)+π\pi x = 2 \pi n - \operatorname{asin}{\left(- y^{8} + 8 y^{7} - 28 y^{6} + 56 y^{5} - 70 y^{4} + 56 y^{3} - 28 y^{2} + 8 y - 2 \right)} + \pi
O
πx=2πnasin(y88y7+28y656y5+70y456y3+28y28y+2)\pi x = 2 \pi n - \operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}
πx=2πn+asin(y88y7+28y656y5+70y456y3+28y28y+2)+π\pi x = 2 \pi n + \operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)} + \pi
, donde n es cualquier número entero
Dividamos ambos miembros de la ecuación obtenida en
π\pi
obtenemos la respuesta:
x1=2πnasin(y88y7+28y656y5+70y456y3+28y28y+2)πx_{1} = \frac{2 \pi n - \operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}}{\pi}
x2=2πn+asin(y88y7+28y656y5+70y456y3+28y28y+2)+ππx_{2} = \frac{2 \pi n + \operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)} + \pi}{\pi}
Gráfica
Respuesta rápida [src]
            /    /     8       3       5            7       2       6       4\\       /    /     8       3       5            7       2       6       4\\
     pi + re\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //   I*im\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //
x1 = -------------------------------------------------------------------------- + -----------------------------------------------------------------------
                                         pi                                                                          pi                                  
x1=re(asin(y88y7+28y656y5+70y456y3+28y28y+2))+ππ+iim(asin(y88y7+28y656y5+70y456y3+28y28y+2))πx_{1} = \frac{\operatorname{re}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)} + \pi}{\pi} + \frac{i \operatorname{im}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}}{\pi}
         /    /     8       3       5            7       2       6       4\\       /    /     8       3       5            7       2       6       4\\
       re\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //   I*im\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //
x2 = - --------------------------------------------------------------------- - -----------------------------------------------------------------------
                                         pi                                                                       pi                                  
x2=re(asin(y88y7+28y656y5+70y456y3+28y28y+2))πiim(asin(y88y7+28y656y5+70y456y3+28y28y+2))πx_{2} = - \frac{\operatorname{re}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}}{\pi} - \frac{i \operatorname{im}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}}{\pi}
x2 = -re(asin(y^8 - 8*y^7 + 28*y^6 - 56*y^5 + 70*y^4 - 56*y^3 + 28*y^2 - 8*y + 2))/pi - i*im(asin(y^8 - 8*y^7 + 28*y^6 - 56*y^5 + 70*y^4 - 56*y^3 + 28*y^2 - 8*y + 2))/pi
Suma y producto de raíces [src]
suma
       /    /     8       3       5            7       2       6       4\\       /    /     8       3       5            7       2       6       4\\       /    /     8       3       5            7       2       6       4\\       /    /     8       3       5            7       2       6       4\\
pi + re\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //   I*im\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //     re\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //   I*im\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //
-------------------------------------------------------------------------- + ----------------------------------------------------------------------- + - --------------------------------------------------------------------- - -----------------------------------------------------------------------
                                    pi                                                                          pi                                                                         pi                                                                       pi                                  
(re(asin(y88y7+28y656y5+70y456y3+28y28y+2))+ππ+iim(asin(y88y7+28y656y5+70y456y3+28y28y+2))π)+(re(asin(y88y7+28y656y5+70y456y3+28y28y+2))πiim(asin(y88y7+28y656y5+70y456y3+28y28y+2))π)\left(\frac{\operatorname{re}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)} + \pi}{\pi} + \frac{i \operatorname{im}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}}{\pi}\right) + \left(- \frac{\operatorname{re}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}}{\pi} - \frac{i \operatorname{im}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}}{\pi}\right)
=
       /    /     8       3       5            7       2       6       4\\     /    /     8       3       5            7       2       6       4\\
pi + re\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //   re\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //
-------------------------------------------------------------------------- - ---------------------------------------------------------------------
                                    pi                                                                         pi                                 
re(asin(y88y7+28y656y5+70y456y3+28y28y+2))+ππre(asin(y88y7+28y656y5+70y456y3+28y28y+2))π\frac{\operatorname{re}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)} + \pi}{\pi} - \frac{\operatorname{re}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}}{\pi}
producto
/       /    /     8       3       5            7       2       6       4\\       /    /     8       3       5            7       2       6       4\\\ /    /    /     8       3       5            7       2       6       4\\       /    /     8       3       5            7       2       6       4\\\
|pi + re\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //   I*im\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //| |  re\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //   I*im\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y //|
|-------------------------------------------------------------------------- + -----------------------------------------------------------------------|*|- --------------------------------------------------------------------- - -----------------------------------------------------------------------|
\                                    pi                                                                          pi                                  / \                                    pi                                                                       pi                                  /
(re(asin(y88y7+28y656y5+70y456y3+28y28y+2))+ππ+iim(asin(y88y7+28y656y5+70y456y3+28y28y+2))π)(re(asin(y88y7+28y656y5+70y456y3+28y28y+2))πiim(asin(y88y7+28y656y5+70y456y3+28y28y+2))π)\left(\frac{\operatorname{re}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)} + \pi}{\pi} + \frac{i \operatorname{im}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}}{\pi}\right) \left(- \frac{\operatorname{re}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}}{\pi} - \frac{i \operatorname{im}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}}{\pi}\right)
=
 /    /    /     8       3       5            7       2       6       4\\     /    /     8       3       5            7       2       6       4\\\ /         /    /     8       3       5            7       2       6       4\\     /    /     8       3       5            7       2       6       4\\\ 
-\I*im\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y // + re\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y ///*\pi + I*im\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y // + re\asin\2 + y  - 56*y  - 56*y  - 8*y - 8*y  + 28*y  + 28*y  + 70*y /// 
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                                     2                                                                                                                                                    
                                                                                                                                                   pi                                                                                                                                                     
(re(asin(y88y7+28y656y5+70y456y3+28y28y+2))+iim(asin(y88y7+28y656y5+70y456y3+28y28y+2)))(re(asin(y88y7+28y656y5+70y456y3+28y28y+2))+iim(asin(y88y7+28y656y5+70y456y3+28y28y+2))+π)π2- \frac{\left(\operatorname{re}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)} + i \operatorname{im}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)}\right) \left(\operatorname{re}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)} + i \operatorname{im}{\left(\operatorname{asin}{\left(y^{8} - 8 y^{7} + 28 y^{6} - 56 y^{5} + 70 y^{4} - 56 y^{3} + 28 y^{2} - 8 y + 2 \right)}\right)} + \pi\right)}{\pi^{2}}
-(i*im(asin(2 + y^8 - 56*y^3 - 56*y^5 - 8*y - 8*y^7 + 28*y^2 + 28*y^6 + 70*y^4)) + re(asin(2 + y^8 - 56*y^3 - 56*y^5 - 8*y - 8*y^7 + 28*y^2 + 28*y^6 + 70*y^4)))*(pi + i*im(asin(2 + y^8 - 56*y^3 - 56*y^5 - 8*y - 8*y^7 + 28*y^2 + 28*y^6 + 70*y^4)) + re(asin(2 + y^8 - 56*y^3 - 56*y^5 - 8*y - 8*y^7 + 28*y^2 + 28*y^6 + 70*y^4)))/pi^2