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If `z_1 and z_2`, are two non-zero complex numbers such tha `|z_1+z_2|=|z_1|+|z_2|` then `arg(z_1)-arg(z_2)` is equal to

A

`-pi`

B

`-pi//2`

C

`pi//2`

D

0

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The correct Answer is:
D
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ARIHANT MATHS-COMPLEX NUMBERS-Exercise (Questions Asked In Previous 13 Years Exam)
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  12. Let A, B, C be three sets of complex number as defined below: A={z:Img...

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  17. Let z=x+i y be a complex number where xa n dy are integers. Then, the ...

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  18. Let z=costheta+isintheta. Then the value of sum(m->1-15)Img(z^(2m-1...

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