A complex number to add, divide, multiply, and divide, but as a complex number with up to 4 models each have advantages and limitations that are different is a form to add or delete a simpler than multiplication and Division. Best polar pattern and trigonometry are multiplying or dividing each other easier, add, and delete is not.Therefore, there must be a change of format complex numbers to achieve fast and accurate calculations.3.1 changing from form polar format. Changing a form's polar pattern is divided into two stages: the first stage is to find out the size of the phase and step 2 is the angle of . Finding the size of a three-phase services
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