Question: Code explanation

Hi Dr. Kamel Boughrara,

I have a question,  I know phi = B*A, but in code i can't understand a part of it, can you kindly explain it in engineering terms.  

kindly see the attach file for phi.

Second question

why e-->sum(factor(e(t)),n=1..100), wht this means, 

Third question

is  wrm = 2*Pi*f  

I am attaching file for your kind consideration

 

 help_requrired.mw

I shall be very thankful. 

A.Q

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