Find all indicated roots. Write your answer in the specified form.Eighth roots of i; trigonometric form
A. 
+ 
i, 
- 
i, - 
+ 
i, - 
- 
i
B. 1, -1, i, -i
C. 1, -1 , i, -i, 
+ 
i, 
- 
i, - 
+ 
i, - 
- 
i
D. cis 
, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
Answer: D
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