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Question

The 4th roots of unity in the argand plane form a


A
Square
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B
Rectangle
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C
Parallelogram
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D
Rhombus
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Solution

The correct option is A Square
The fourth roots of unity are $$1,i,-1, -i $$. Hence, they form a square in the Argand plane. 
We can see that by plotting the points on the graph with coordinate system according to that of complex numbers.

Maths

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