If ${z_1}$ and ${z_2}$ are two non-zero complex numbers such that $|{z_1} + {z_2}| = |{z_1}| + |{z_2}|,$then arg $({z_1}) - $arg $({z_2})$ is equal to

  • [AIEEE 2005]
  • [IIT 1979]
  • [IIT 1987]
  • A

    $ - \pi $

  • B

    $ - \frac{\pi }{2}$

  • C

    $\frac{\pi }{2}$

  • D

    $0$

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  • [IIT 2018]

Find the modulus and the argument of the complex number $z=-\sqrt{3}+i$

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  • [JEE MAIN 2014]