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Complex numbers — Question 134

Original QCE Vault practice · 1 mark

Q134 · Practice questionTechnology-activeSimple familiar1 mark

QUESTION 134

The polar point 4cis⁡(π2)4\operatorname{cis}(\frac{\pi}{2}) is
(A)
4i4i
(B)
−4-4
(C)
−4i-4i
(D)
44
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