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

question 27

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) \(- 1 , \cos \left( 25.7 ^ { \circ } \right) + i \sin \left( 25.7 ^ { \circ } \right) , \cos \left( 51.4 ^ { \circ } \right) + i \sin \left( 51.4 ^ { \circ } \right) , \cos \left( 77.1 ^ { \circ } \right) + i \sin \left( 77.1 ^ { \circ } \right) , \cos \left( 102.9 ^ { \circ } \right) + i \sin \left( 102.9 ^ { \circ } \right)\), \(\cos \left( 128.6 ^ { \circ } \right) + i \sin \left( 128.6 ^ { \circ } \right) , \cos \left( 154.3 ^ { \circ } \right) + i \sin \left( 154.3 ^ { \circ } \right)\)