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De Moivre's Theorem and Roots of Complex Numbers
Grade Level
Pre-Calculus
Pre-CAL.128 De Moivre's Theorem and Roots of Complex Numbers
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Which statement correctly describes the cube roots of 27 cis(270 deg)?
A
They have modulus 9 and are 60 degrees apart.
B
They have modulus 3 and arguments 90 deg, 210 deg, and 330 deg.
C
They have modulus 27 and arguments 90 deg, 210 deg, and 330 deg.
D
They have modulus 3 and arguments 270 deg, 390 deg, and 510 deg only.
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