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Additional Concepts
- x327i=0x ^ { 3 } - 27 i = 0

Question 120

Multiple Choice

Additional Concepts
- x327i=0x ^ { 3 } - 27 i = 0


A) 3(cos30+isin30) ,3(cos150+isin150) ,3(cos270+isin270) 3 \left( \cos 30 ^ { \circ } + i \sin 30 ^ { \circ } \right) , 3 \left( \cos 150 ^ { \circ } + i \sin 150 ^ { \circ } \right) , 3 \left( \cos 270 ^ { \circ } + i \sin 270 ^ { \circ } \right)
B) 3(cos0+isin0) ,3(cos120+isin120) ,3(cos240+isin240) 3 \left( \cos 0 ^ { \circ } + i \sin 0 ^ { \circ } \right) , 3 \left( \cos 120 ^ { \circ } + i \sin 120 ^ { \circ } \right) , 3 \left( \cos 240 + i \sin 240 ^ { \circ } \right)
C) 3(cos60+isin60) ,3(cos180+isin180) ,3(cos300+isin300) 3 \left( \cos 60 ^ { \circ } + i \sin 60 ^ { \circ } \right) , 3 \left( \cos 180 ^ { \circ } + i \sin 180 ^ { \circ } \right) , 3 \left( \cos 300 ^ { \circ } + i \sin 300 ^ { \circ } \right)
D) 1,1,i1 , - 1 , - \mathrm { i }

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