This is because squaring complex nos with arg (-2pi/3) gives them an arg of -4pi/3, which is an equilvalent arg to 2pi/3 and therefore satisfies the condition.I got that but in the solution for some reason they also drew in (-2pi/3)
Part b well we need to know this fact
the answer is the y-axisPart b well we need to know this factand
and
Once this is known our next step is pretty straightforward.
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I would like @=)(= to confirm the answer for this one.