$\operatorname{Arg}(\mathrm{z})=\frac{\pi}{3}$ হলে $\operatorname{Arg}\left(\mathrm{i}^{2} \mathrm{z}\right)=$ কোনটি ?

$\begin{aligned} \operatorname{Arg}\left(i^{2} z\right) & =\operatorname{Arg}\left(i^{2}\right)+\operatorname{Arg}(z) \\ & =\operatorname{Arg}(-1)+\operatorname{Arg}(z) \\ & =\pi+\frac{\pi}{3} \\ & =\frac{4 \pi}{3}\end{aligned}$