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Find the Fourth Roots Of −12−32i- \frac { 1 } { 2 } - \frac { \sqrt { 3 } } { 2 } i

Question 21

Multiple Choice

Find the fourth roots of −12−32i- \frac { 1 } { 2 } - \frac { \sqrt { 3 } } { 2 } i . Write the roots in trigonometric form.


A)
w1=cos⁡(50∘) +isin⁡(50∘) w2=cos⁡(140∘) +isin⁡(140∘) w3=cos⁡(230∘) +isin⁡(230∘) w4=cos⁡(320∘) +isin⁡(320∘) \begin{array} { l } w _ { 1 } = \cos \left( 50 ^ { \circ } \right) + i \sin \left( 50 ^ { \circ } \right) \\w _ { 2 } = \cos \left( 140 ^ { \circ } \right) + i \sin \left( 140 ^ { \circ } \right) \\w _ { 3 } = \cos \left( 230 ^ { \circ } \right) + i \sin \left( 230 ^ { \circ } \right) \\w _ { 4 } = \cos \left( 320 ^ { \circ } \right) + i \sin \left( 320 ^ { \circ } \right) \end{array}
B)
w1=cos⁡(60∘) +isin⁡(60∘) w2=cos⁡(150∘) +isin⁡(150∘) w3=cos⁡(240∘) +isin⁡(240∘) w4=cos⁡(330∘) +isin⁡(330∘) \begin{array} { l } w _ { 1 } = \cos \left( 60 ^ { \circ } \right) + i \sin \left( 60 ^ { \circ } \right) \\w _ { 2 } = \cos \left( 150 ^ { \circ } \right) + i \sin \left( 150 ^ { \circ } \right) \\w _ { 3 } = \cos \left( 240 ^ { \circ } \right) + i \sin \left( 240 ^ { \circ } \right) \\w _ { 4 } = \cos \left( 330 ^ { \circ } \right) + i \sin \left( 330 ^ { \circ } \right) \end{array}
C)
w1=cos⁡(65∘) +isin⁡(65∘) w2=cos⁡(155∘) +isin⁡(155∘) w3=cos⁡(245∘) +isin⁡(245∘) w4=cos⁡(335∘) +isin⁡(335∘) \begin{array} { l } w _ { 1 } = \cos \left( 65 ^ { \circ } \right) + i \sin \left( 65 ^ { \circ } \right) \\w _ { 2 } = \cos \left( 155 ^ { \circ } \right) + i \sin \left( 155 ^ { \circ } \right) \\w _ { 3 } = \cos \left( 245 ^ { \circ } \right) + i \sin \left( 245 ^ { \circ } \right) \\w _ { 4 } = \cos \left( 335 ^ { \circ } \right) + i \sin \left( 335 ^ { \circ } \right) \end{array}
D)
w1=cos⁡(55∘) +isin⁡(55∘) w2=cos⁡(145∘) +isin⁡(145∘) w3=cos⁡(235∘) +isin⁡(235∘) w4=cos⁡(325∘) +isin⁡(325∘) \begin{array} { l } w _ { 1 } = \cos \left( 55 ^ { \circ } \right) + i \sin \left( 55 ^ { \circ } \right) \\w _ { 2 } = \cos \left( 145 ^ { \circ } \right) + i \sin \left( 145 ^ { \circ } \right) \\w _ { 3 } = \cos \left( 235 ^ { \circ } \right) + i \sin \left( 235 ^ { \circ } \right) \\w _ { 4 } = \cos \left( 325 ^ { \circ } \right) + i \sin \left( 325 ^ { \circ } \right) \end{array}
E)
w1=cos⁡(70∘) +isin⁡(70∘) w2=cos⁡(160∘) +isin⁡(160∘) w3=cos⁡(250∘) +isin⁡(250∘) w4=cos⁡(340∘) +isin⁡(340∘) \begin{array} { l } w _ { 1 } = \cos \left( 70 ^ { \circ } \right) + i \sin \left( 70 ^ { \circ } \right) \\w _ { 2 } = \cos \left( 160 ^ { \circ } \right) + i \sin \left( 160 ^ { \circ } \right) \\w _ { 3 } = \cos \left( 250 ^ { \circ } \right) + i \sin \left( 250 ^ { \circ } \right) \\w _ { 4 } = \cos \left( 340 ^ { \circ } \right) + i \sin \left( 340 ^ { \circ } \right) \end{array}

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