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cos(px)=-7/3 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
cos(p*x) = -7/3
$$\cos{\left(p x \right)} = - \frac{7}{3}$$
Solución detallada
Tenemos la ecuación
$$\cos{\left(p x \right)} = - \frac{7}{3}$$
es la ecuación trigonométrica más simple
Como el miembro derecho de la ecuación
en el módulo =
True

pero cos
no puede ser más de 1 o menos de -1
significa que la ecuación correspondiente no tiene solución.
Respuesta rápida [src]
       /  (-re(acos(-7/3)) + 2*pi)*im(p)   im(acos(-7/3))*re(p)\   (-re(acos(-7/3)) + 2*pi)*re(p)   im(p)*im(acos(-7/3))
x1 = I*|- ------------------------------ - --------------------| + ------------------------------ - --------------------
       |           2        2                  2        2      |            2        2                  2        2      
       \         im (p) + re (p)             im (p) + re (p)   /          im (p) + re (p)             im (p) + re (p)   
$$x_{1} = i \left(- \frac{\operatorname{re}{\left(p\right)} \operatorname{im}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}} - \frac{\left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + 2 \pi\right) \operatorname{im}{\left(p\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}}\right) + \frac{\left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + 2 \pi\right) \operatorname{re}{\left(p\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}} - \frac{\operatorname{im}{\left(p\right)} \operatorname{im}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}}$$
         /acos(-7/3)\     /acos(-7/3)\
x2 = I*im|----------| + re|----------|
         \    p     /     \    p     /
$$x_{2} = \operatorname{re}{\left(\frac{\operatorname{acos}{\left(- \frac{7}{3} \right)}}{p}\right)} + i \operatorname{im}{\left(\frac{\operatorname{acos}{\left(- \frac{7}{3} \right)}}{p}\right)}$$
x2 = re(acos(-7/3)/p) + i*im(acos(-7/3)/p)
Suma y producto de raíces [src]
suma
  /  (-re(acos(-7/3)) + 2*pi)*im(p)   im(acos(-7/3))*re(p)\   (-re(acos(-7/3)) + 2*pi)*re(p)   im(p)*im(acos(-7/3))       /acos(-7/3)\     /acos(-7/3)\
I*|- ------------------------------ - --------------------| + ------------------------------ - -------------------- + I*im|----------| + re|----------|
  |           2        2                  2        2      |            2        2                  2        2             \    p     /     \    p     /
  \         im (p) + re (p)             im (p) + re (p)   /          im (p) + re (p)             im (p) + re (p)                                       
$$\left(\operatorname{re}{\left(\frac{\operatorname{acos}{\left(- \frac{7}{3} \right)}}{p}\right)} + i \operatorname{im}{\left(\frac{\operatorname{acos}{\left(- \frac{7}{3} \right)}}{p}\right)}\right) + \left(i \left(- \frac{\operatorname{re}{\left(p\right)} \operatorname{im}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}} - \frac{\left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + 2 \pi\right) \operatorname{im}{\left(p\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}}\right) + \frac{\left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + 2 \pi\right) \operatorname{re}{\left(p\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}} - \frac{\operatorname{im}{\left(p\right)} \operatorname{im}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}}\right)$$
=
  /  (-re(acos(-7/3)) + 2*pi)*im(p)   im(acos(-7/3))*re(p)\       /acos(-7/3)\   (-re(acos(-7/3)) + 2*pi)*re(p)   im(p)*im(acos(-7/3))     /acos(-7/3)\
I*|- ------------------------------ - --------------------| + I*im|----------| + ------------------------------ - -------------------- + re|----------|
  |           2        2                  2        2      |       \    p     /            2        2                  2        2           \    p     /
  \         im (p) + re (p)             im (p) + re (p)   /                             im (p) + re (p)             im (p) + re (p)                    
$$i \left(- \frac{\operatorname{re}{\left(p\right)} \operatorname{im}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}} - \frac{\left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + 2 \pi\right) \operatorname{im}{\left(p\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}}\right) + \operatorname{re}{\left(\frac{\operatorname{acos}{\left(- \frac{7}{3} \right)}}{p}\right)} + i \operatorname{im}{\left(\frac{\operatorname{acos}{\left(- \frac{7}{3} \right)}}{p}\right)} + \frac{\left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + 2 \pi\right) \operatorname{re}{\left(p\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}} - \frac{\operatorname{im}{\left(p\right)} \operatorname{im}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}}$$
producto
/  /  (-re(acos(-7/3)) + 2*pi)*im(p)   im(acos(-7/3))*re(p)\   (-re(acos(-7/3)) + 2*pi)*re(p)   im(p)*im(acos(-7/3))\ /    /acos(-7/3)\     /acos(-7/3)\\
|I*|- ------------------------------ - --------------------| + ------------------------------ - --------------------|*|I*im|----------| + re|----------||
|  |           2        2                  2        2      |            2        2                  2        2      | \    \    p     /     \    p     //
\  \         im (p) + re (p)             im (p) + re (p)   /          im (p) + re (p)             im (p) + re (p)   /                                    
$$\left(\operatorname{re}{\left(\frac{\operatorname{acos}{\left(- \frac{7}{3} \right)}}{p}\right)} + i \operatorname{im}{\left(\frac{\operatorname{acos}{\left(- \frac{7}{3} \right)}}{p}\right)}\right) \left(i \left(- \frac{\operatorname{re}{\left(p\right)} \operatorname{im}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}} - \frac{\left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + 2 \pi\right) \operatorname{im}{\left(p\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}}\right) + \frac{\left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + 2 \pi\right) \operatorname{re}{\left(p\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}} - \frac{\operatorname{im}{\left(p\right)} \operatorname{im}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)}}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}}\right)$$
=
 /    /acos(-7/3)\     /acos(-7/3)\\                                                                                                                     
-|I*im|----------| + re|----------||*(I*((-re(acos(-7/3)) + 2*pi)*im(p) + im(acos(-7/3))*re(p)) + im(p)*im(acos(-7/3)) - (-re(acos(-7/3)) + 2*pi)*re(p)) 
 \    \    p     /     \    p     //                                                                                                                     
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                                                                       2        2                                                                        
                                                                     im (p) + re (p)                                                                     
$$- \frac{\left(\operatorname{re}{\left(\frac{\operatorname{acos}{\left(- \frac{7}{3} \right)}}{p}\right)} + i \operatorname{im}{\left(\frac{\operatorname{acos}{\left(- \frac{7}{3} \right)}}{p}\right)}\right) \left(i \left(\operatorname{re}{\left(p\right)} \operatorname{im}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + \left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + 2 \pi\right) \operatorname{im}{\left(p\right)}\right) - \left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)} + 2 \pi\right) \operatorname{re}{\left(p\right)} + \operatorname{im}{\left(p\right)} \operatorname{im}{\left(\operatorname{acos}{\left(- \frac{7}{3} \right)}\right)}\right)}{\left(\operatorname{re}{\left(p\right)}\right)^{2} + \left(\operatorname{im}{\left(p\right)}\right)^{2}}$$
-(i*im(acos(-7/3)/p) + re(acos(-7/3)/p))*(i*((-re(acos(-7/3)) + 2*pi)*im(p) + im(acos(-7/3))*re(p)) + im(p)*im(acos(-7/3)) - (-re(acos(-7/3)) + 2*pi)*re(p))/(im(p)^2 + re(p)^2)