Find all specified roots.Eleventh roots of 1.

A. 1, cis , cis , cis , cis , cis , cis , cis , cis , cis , cis 
B. 1, cis , cis , cis , cis , cis 
C. 1, cis , cis , cis , cis , cis , cis , cis , cis , cis , cis 
D. 1, cis , cis , cis , cis , cis , cis , cis , cis , cis , -1


Answer: C

Mathematics

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A.

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