Additional Concepts
- $$x ^ { 7 } - 1 = 0$$

Multiple Choice

Additional Concepts
- $$x ^ { 7 } - 1 = 0$$

A) $1 , \cos \left( 51.4 ^ { \circ } \right) + i \sin \left( 51.4 ^ { \circ } \right) , \cos \left( 102.9 ^ { \circ } \right) + i \sin \left( 102.9 ^ { \circ } \right) , \cos \left( 154.3 ^ { \circ } \right) + i \sin \left( 154.3 ^ { \circ } \right) , \cos \left( 205.7 ^ { \circ } \right) + i$ $\sin \left( 205.7 ^ { \circ } \right) , \cos \left( 257.1 ^ { \circ } \right) + i \sin \left( 257.1 ^ { \circ } \right) , \cos \left( 308.6 ^ { \circ } \right) + i \sin \left( 308.6 ^ { \circ } \right)$
B) $1 , \cos \left( 25.7 ^ { \circ } \right) + i \sin \left( 25.7 ^ { \circ } \right) , \cos \left( 51.4 ^ { \circ } \right) + i \sin \left( 51.4 ^ { \circ } \right) , \cos \left( 77.1 ^ { \circ } \right) + i \sin \left( 77.1 ^ { \circ } \right) , \cos \left( 102.9 ^ { \circ } \right) + i \sin \left( 102.9 ^ { \circ } \right)$ , $\cos \left( 128.6 ^ { \circ } \right) + i \sin \left( 128.6 ^ { \circ } \right) , \cos \left( 154.3 ^ { \circ } \right) + i \sin \left( 154.3 ^ { \circ } \right)$
C) $1 , \cos \left( 51.4 ^ { \circ } \right) + i \sin \left( 51.4 ^ { \circ } \right) , \cos \left( 102.9 ^ { \circ } \right) + i \sin \left( 102.9 ^ { \circ } \right) , \cos \left( 154.3 ^ { \circ } \right) + i \sin \left( 154.3 ^ { \circ } \right) , \cos \left( 205.7 ^ { \circ } \right) + i$ $\sin \left( 205.7 ^ { \circ } \right) , \cos \left( 257.1 ^ { \circ } \right) + i \sin \left( 257.1 ^ { \circ } \right) , \cos \left( 308.6 ^ { \circ } \right) + i \sin \left( 308.6 ^ { \circ } \right) , - 1$
D) $- 1 , \cos \left( 25.7 ^ { \circ } \right) + i \sin \left( 25.7 ^ { \circ } \right) , \cos \left( 51.4 ^ { \circ } \right) + i \sin \left( 51.4 ^ { \circ } \right) , \cos \left( 77.1 ^ { \circ } \right) + i \sin \left( 77.1 ^ { \circ } \right) , \cos \left( 102.9 ^ { \circ } \right) + i \sin \left( 102.9 ^ { \circ } \right)$ , $\cos \left( 128.6 ^ { \circ } \right) + i \sin \left( 128.6 ^ { \circ } \right) , \cos \left( 154.3 ^ { \circ } \right) + i \sin \left( 154.3 ^ { \circ } \right)$