7
QuizMultiple Choice
Powers and Roots of Complex Numbers
Question 7 • Precalculus
Given z = , what is z3?
Answer
A
12 (cosine ( StartFraction pi over 2 EndFraction) plus i sine (StartFraction pi over 2 EndFraction))
B
64 (cosine ( StartFraction pi over 2 EndFraction) plus i sine (StartFraction pi over 2 EndFraction))
C
12 (cosine ( StartFraction 3pi over 2 EndFraction) plus i sine (StartFraction 3pi over 2 EndFraction))
D
64 (cosine ( StartFraction 3pi over 2 EndFraction) plus i sine (StartFraction 3pi over 2 EndFraction))