Perform the Operation and Leave the Result in Trigonometric Form $\frac { \cos \pi + i \sin \pi } { \cos ( \pi / 9 ) + i \sin ( \pi / 9 ) }$

question 279

Multiple Choice

Perform the operation and leave the result in trigonometric form. $\frac { \cos \pi + i \sin \pi } { \cos ( \pi / 9 ) + i \sin ( \pi / 9 ) }$

• A) \(\cos \frac { 9 \pi } { 8 } - i \sin \frac { 9 \pi } { 8 }\)
• B) \(\cos \frac { 9 \pi } { 8 } - \sin \frac { 9 \pi } { 8 }\)
• C) \(\cos \frac { 8 \pi } { 9 } + i \sin \frac { 8 \pi } { 9 }\)
• D) \(\cos \frac { 8 \pi } { 9 } - i \sin \frac { 8 \pi } { 9 }\)
• E) \(\cos \frac { 9 \pi } { 8 } + i \sin \frac { 9 \pi } { 8 }\)

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