If the roots of the equation $z^2-i=0$ are $\alpha$ and $\beta$,then $|\operatorname{Arg} \beta-\operatorname{Arg} \alpha|=$

  • A
    $2 \pi$
  • B
    $\frac{\pi}{2}$
  • C
    $\pi$
  • D
    $\frac{\pi}{4}$

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$arg(5 - \sqrt{3}i) = $

If the $\operatorname{Arg} z_1$ and $\operatorname{Arg} \overline{z_2}$ are $\frac{\pi}{3}$ and $\frac{\pi}{5}$ respectively,then the value of $\operatorname{Arg} z_1 + \operatorname{Arg} z_2$ is

Argument of $\frac{1-i \sqrt{3}}{1+i \sqrt{3}}$ is (in $^{\circ}$)

Consider the following statements:
$I$: If $a$ and $b$ are positive real numbers,then $\sqrt{-a} \times \sqrt{-b} = \sqrt{ab}$
$II$: The argument of $\frac{1+i\sqrt{3}}{1-i\sqrt{3}}$ is $120^{\circ}$
Then:

If $|z| = 4$ and $\text{arg}(z) = \frac{5\pi}{6}$,then $z =$

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