Hi !

Sorry if it isn't the correct subforum...

The question is :

Find the argument of $\displaystyle \frac{(z_1+z_2)^2}{z_1z_2}$, given that $\displaystyle |z_1|=|z_2|=1$

I found it to be $\displaystyle 2arg(z_1+z_2)-arg(z_1)-arg(z_2)$, but couldn't go any further.. Did I miss something ?

Thanks in advance