Solución detallada
Tenemos la ecuación:
$$y = c_{1} \cos{\left(\frac{x}{4} \right)} - c_{2} \sin{\left(\frac{x}{4} \right)}$$
cambiamos:
$$y = c_{1} \cos{\left(\frac{x}{4} \right)} - c_{2} \sin{\left(\frac{x}{4} \right)}$$
Abrimos los paréntesis en el miembro derecho de la ecuación
y = c1*cosx/4 - c2*sinx/4
Obtenemos la respuesta: y = c1*cos(x/4) - c2*sin(x/4)
/ /x\\ / / /x\\ / /x\\\ / /x\\
y1 = - re|c2*sin|-|| + I*|- im|c2*sin|-|| + im|c1*cos|-||| + re|c1*cos|-||
\ \4// \ \ \4// \ \4/// \ \4//
$$y_{1} = i \left(\operatorname{im}{\left(c_{1} \cos{\left(\frac{x}{4} \right)}\right)} - \operatorname{im}{\left(c_{2} \sin{\left(\frac{x}{4} \right)}\right)}\right) + \operatorname{re}{\left(c_{1} \cos{\left(\frac{x}{4} \right)}\right)} - \operatorname{re}{\left(c_{2} \sin{\left(\frac{x}{4} \right)}\right)}$$
y1 = i*(im(c1*cos(x/4)) - im(c2*sin(x/4))) + re(c1*cos(x/4)) - re(c2*sin(x/4))
Suma y producto de raíces
[src]
/ /x\\ / / /x\\ / /x\\\ / /x\\
- re|c2*sin|-|| + I*|- im|c2*sin|-|| + im|c1*cos|-||| + re|c1*cos|-||
\ \4// \ \ \4// \ \4/// \ \4//
$$i \left(\operatorname{im}{\left(c_{1} \cos{\left(\frac{x}{4} \right)}\right)} - \operatorname{im}{\left(c_{2} \sin{\left(\frac{x}{4} \right)}\right)}\right) + \operatorname{re}{\left(c_{1} \cos{\left(\frac{x}{4} \right)}\right)} - \operatorname{re}{\left(c_{2} \sin{\left(\frac{x}{4} \right)}\right)}$$
/ /x\\ / / /x\\ / /x\\\ / /x\\
- re|c2*sin|-|| + I*|- im|c2*sin|-|| + im|c1*cos|-||| + re|c1*cos|-||
\ \4// \ \ \4// \ \4/// \ \4//
$$i \left(\operatorname{im}{\left(c_{1} \cos{\left(\frac{x}{4} \right)}\right)} - \operatorname{im}{\left(c_{2} \sin{\left(\frac{x}{4} \right)}\right)}\right) + \operatorname{re}{\left(c_{1} \cos{\left(\frac{x}{4} \right)}\right)} - \operatorname{re}{\left(c_{2} \sin{\left(\frac{x}{4} \right)}\right)}$$
/ /x\\ / / /x\\ / /x\\\ / /x\\
- re|c2*sin|-|| + I*|- im|c2*sin|-|| + im|c1*cos|-||| + re|c1*cos|-||
\ \4// \ \ \4// \ \4/// \ \4//
$$i \left(\operatorname{im}{\left(c_{1} \cos{\left(\frac{x}{4} \right)}\right)} - \operatorname{im}{\left(c_{2} \sin{\left(\frac{x}{4} \right)}\right)}\right) + \operatorname{re}{\left(c_{1} \cos{\left(\frac{x}{4} \right)}\right)} - \operatorname{re}{\left(c_{2} \sin{\left(\frac{x}{4} \right)}\right)}$$
/ /x\\ / / /x\\ / /x\\\ / /x\\
- re|c2*sin|-|| + I*|- im|c2*sin|-|| + im|c1*cos|-||| + re|c1*cos|-||
\ \4// \ \ \4// \ \4/// \ \4//
$$i \left(\operatorname{im}{\left(c_{1} \cos{\left(\frac{x}{4} \right)}\right)} - \operatorname{im}{\left(c_{2} \sin{\left(\frac{x}{4} \right)}\right)}\right) + \operatorname{re}{\left(c_{1} \cos{\left(\frac{x}{4} \right)}\right)} - \operatorname{re}{\left(c_{2} \sin{\left(\frac{x}{4} \right)}\right)}$$
-re(c2*sin(x/4)) + i*(-im(c2*sin(x/4)) + im(c1*cos(x/4))) + re(c1*cos(x/4))