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If z1 and z2, are two non-zero complex...

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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