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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Definitions:

Control Limits

Thresholds set in quality control processes beyond which a process is considered to be out of control.

Centerline

In statistical process control charts, it represents the mean or average value of the process measurements over time, serving as a benchmark for detecting variations.

Lower Control Limit

In quality control, the lower threshold below which a process is considered out of control and corrective action may be necessary.

Defective Units

Items in a batch of products that fail to meet the required quality standards.