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Complex numbers — Question 13

Original QCE Vault practice · 1 mark

Q13 · Practice questionSimple familiar1 mark

QUESTION 13

The complex number z=1−i31+iz=\dfrac{1-i\sqrt3}{1+i} can be written in polar form as
(A)
2cis⁡(−7π/12)\sqrt2\operatorname{cis}(-7\pi/12)
(B)
2cis⁡(π/12)\sqrt2\operatorname{cis}(\pi/12)
(C)
2cis⁡(−7π/12)2\operatorname{cis}(-7\pi/12)
(D)
2cis⁡(7π/12)\sqrt2\operatorname{cis}(7\pi/12)
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