If $-1 + \sqrt{-3} = re^{i\theta}$,then $\theta$ is equal to

  • A
    $\frac{\pi}{3}$
  • B
    $-\frac{\pi}{3}$
  • C
    $\frac{2\pi}{3}$
  • D
    $-\frac{2\pi}{3}$

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Similar Questions

The argument of the complex number $\sin \frac{6\pi}{5} + i(1 + \cos \frac{6\pi}{5})$ is

Match the items of List-$I$ with those of List-$II$:
List-$I$ (Complex number)List-$II$ (Polar form)
$(i) \sqrt{3}-i$$(a) 2 \operatorname{cis} \frac{\pi}{6}$
$(ii) \sqrt{3}+i$$(b) 2 \operatorname{cis} \frac{5 \pi}{6}$
$(iii) -\sqrt{3}+i$$(c) 2 \operatorname{cis}\left(-\frac{5 \pi}{6}\right)$
$(iv) -\sqrt{3}-i$$(d) 2 \operatorname{cis}\left(-\frac{\pi}{6}\right)$

The correct matching is:

The complex number with argument $\frac{5 \pi}{6}$ at a distance of $2$ units from the origin is

The amplitude of $\sin \frac{\pi}{5} + i(1 - \cos \frac{\pi}{5})$ is:

Let $z_{1}$ and $z_{2}$ be two complex numbers such that $\overline{z}_{1} = i \overline{z}_{2}$ and $\arg \left( \frac{z_{1}}{\overline{z}_{2}} \right) = \pi$. Then:

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