Represent the complex number graphically,and find the trigonometric form of the number.
-8i

A) $$8 \left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)$$
B) $$8 ( \cos \pi - i \sin \pi )$$
C) $$8 \left( \cos \frac { 3 \pi } { 2 } - i \sin \frac { 3 \pi } { 2 } \right)$$
D) $$8 ( \cos \pi + i \sin \pi )$$
E) $$8 \left( \cos \frac { 3 \pi } { 2 } + i \sin \frac { 3 \pi } { 2 } \right)$$

Question

Represent the complex number graphically,and find the trigonometric form of the number. ​
-8i
​
A)​ $$8 \left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)$$ 
B)​ $$8 ( \cos \pi - i \sin \pi )$$ 
C)​ $$8 \left( \cos \frac { 3 \pi } { 2 } - i \sin \frac { 3 \pi } { 2 } \right)$$ 
D) $$8 ( \cos \pi + i \sin \pi )$$ 
E)​ $$8 \left( \cos \frac { 3 \pi } { 2 } + i \sin \frac { 3 \pi } { 2 } \right)$$

Quizplus · Accepted Answer

The Answer of Represent the complex number graphically,and find the trigonometric form of the number. ​
-8i
​
A)​ $$8 \left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)$$ 
B)​ $$8 ( \cos \pi - i \sin \pi )$$ 
C)​ $$8 \left( \cos \frac { 3 \pi } { 2 } - i \sin \frac { 3 \pi } { 2 } \right)$$ 
D) $$8 ( \cos \pi + i \sin \pi )$$ 
E)​ $$8 \left( \cos \frac { 3 \pi } { 2 } + i \sin \frac { 3 \pi } { 2 } \right)$$

Represent the Complex Number Graphically,and Find the Trigonometric Form of the Number