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

question 18

Multiple Choice

Represent the complex number graphically,and find the trigonometric form of the number. ​
12i
​

• A)​ \[12 ( \cos \pi + i \sin \pi )\]
• B)​ \[12 \left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)\]
• C)​ \[12 ( \cos \pi + i \sin \pi )\]
• D) \[12 \left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)\]
• E)​ \[12 ( \cos \pi + i \sin \pi )\]

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