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6.1: Números Complejos, Vectores y Matrices
https://espanol.libretexts.org/Matematicas/Algebra_lineal/Libro%3A_An%C3%A1lisis_Matriz_(Cox)/06%3A_An%C3%A1lisis_Complejo_I/6.01%3A_N%C3%BAmeros_Complejos%2C_Vectores_y_Matrices
$\frac{z_{1}}{z_{2}} \equiv \frac{z_{1}}{z_{2}} \frac{\overline{z_{2}}}{\overline{z_{2}}} = \frac{x_{1}x_{2}+y_{1}y_{2}+i(x_{2}y_{1}-x_{1}y_{2})}{x_{2}^{2}+y_{2}^{2}} \nonumber$ \[\begin{align*} z_{... $\frac{z_{1}}{z_{2}} \equiv \frac{z_{1}}{z_{2}} \frac{\overline{z_{2}}}{\overline{z_{2}}} = \frac{x_{1}x_{2}+y_{1}y_{2}+i(x_{2}y_{1}-x_{1}y_{2})}{x_{2}^{2}+y_{2}^{2}} \nonumber$ $\begin{align*} z_{1}z_{2} &= |z_{1}||z_{2}|(\cos(\theta_{1})\cos(\theta_{2})-\sin(\theta_{1})\sin(\theta_{2})+i(\cos(\theta_{1}) \sin(\theta_{2})+\sin(\theta_{1}) \cos(\theta_{2}))) \\[4pt] &=|z_{1}||z_{2}|(\cos(\theta_{1}+\theta_{2})+i \sin(\theta_{1}+\theta_{2})) \end{align*}$

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