1.

If z_(1)=2+3i, z_(2)=3-2i and z_(3)=-1-2sqrt3i, then which of the following is true? (where, i^(2)=-1)

Answer»

`ARG((z_(2))/(z_(3)))=arg((z_(2)-z_(1))/(z_(3)-z_(1)))`
`arg((z_(2))/(z_(3)))=arg((z_(3))/(z_(1)))`
`(1)/(2)arg((z_(2))/(z_(3)))=arg((z_(2)-z_(1))/(z_(3)-z_(1)))`
`2arg((z_(3))/(z_(2)))=arg((z_(3)-z_(1))/(z_(2)-z_(1)))`

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