Solución detallada
Tenemos la ecuación
$$\cot{\left(n x \right)} - 1 = 0$$
cambiamos
$$\cot{\left(n x \right)} - 1 = 0$$
$$\cot{\left(n x \right)} - 1 = 0$$
Sustituimos
$$w = \cot{\left(n x \right)}$$
Transportamos los términos libres (sin w)
del miembro izquierdo al derecho, obtenemos:
$$w = 1$$
Obtenemos la respuesta: w = 1
hacemos cambio inverso
$$\cot{\left(n x \right)} = w$$
sustituimos w:
pi*re(n) pi*I*im(n)
x1 = ------------------- - -------------------
/ 2 2 \ / 2 2 \
4*\im (n) + re (n)/ 4*\im (n) + re (n)/
$$x_{1} = \frac{\pi \operatorname{re}{\left(n\right)}}{4 \left(\left(\operatorname{re}{\left(n\right)}\right)^{2} + \left(\operatorname{im}{\left(n\right)}\right)^{2}\right)} - \frac{i \pi \operatorname{im}{\left(n\right)}}{4 \left(\left(\operatorname{re}{\left(n\right)}\right)^{2} + \left(\operatorname{im}{\left(n\right)}\right)^{2}\right)}$$
x1 = pi*re(n)/(4*(re(n)^2 + im(n)^2)) - i*pi*im(n)/(4*(re(n)^2 + im(n)^2))
Suma y producto de raíces
[src]
pi*re(n) pi*I*im(n)
------------------- - -------------------
/ 2 2 \ / 2 2 \
4*\im (n) + re (n)/ 4*\im (n) + re (n)/
$$\frac{\pi \operatorname{re}{\left(n\right)}}{4 \left(\left(\operatorname{re}{\left(n\right)}\right)^{2} + \left(\operatorname{im}{\left(n\right)}\right)^{2}\right)} - \frac{i \pi \operatorname{im}{\left(n\right)}}{4 \left(\left(\operatorname{re}{\left(n\right)}\right)^{2} + \left(\operatorname{im}{\left(n\right)}\right)^{2}\right)}$$
pi*re(n) pi*I*im(n)
------------------- - -------------------
/ 2 2 \ / 2 2 \
4*\im (n) + re (n)/ 4*\im (n) + re (n)/
$$\frac{\pi \operatorname{re}{\left(n\right)}}{4 \left(\left(\operatorname{re}{\left(n\right)}\right)^{2} + \left(\operatorname{im}{\left(n\right)}\right)^{2}\right)} - \frac{i \pi \operatorname{im}{\left(n\right)}}{4 \left(\left(\operatorname{re}{\left(n\right)}\right)^{2} + \left(\operatorname{im}{\left(n\right)}\right)^{2}\right)}$$
pi*re(n) pi*I*im(n)
------------------- - -------------------
/ 2 2 \ / 2 2 \
4*\im (n) + re (n)/ 4*\im (n) + re (n)/
$$\frac{\pi \operatorname{re}{\left(n\right)}}{4 \left(\left(\operatorname{re}{\left(n\right)}\right)^{2} + \left(\operatorname{im}{\left(n\right)}\right)^{2}\right)} - \frac{i \pi \operatorname{im}{\left(n\right)}}{4 \left(\left(\operatorname{re}{\left(n\right)}\right)^{2} + \left(\operatorname{im}{\left(n\right)}\right)^{2}\right)}$$
pi*(-I*im(n) + re(n))
---------------------
/ 2 2 \
4*\im (n) + re (n)/
$$\frac{\pi \left(\operatorname{re}{\left(n\right)} - i \operatorname{im}{\left(n\right)}\right)}{4 \left(\left(\operatorname{re}{\left(n\right)}\right)^{2} + \left(\operatorname{im}{\left(n\right)}\right)^{2}\right)}$$
pi*(-i*im(n) + re(n))/(4*(im(n)^2 + re(n)^2))