
Complex Analysis Complex Analysis Math Forum 
 LinkBack  Thread Tools  Display Modes 
December 12th, 2010, 09:32 AM  #1 
Newbie Joined: Dec 2010 Posts: 3 Thanks: 0  Complex Numbers Question PLEASE HELP
[attachment=0:1uzsrvmf]Assignment picture.png[/attachment:1uzsrvmf] Any help would be much appreciated. Thank you. 
December 12th, 2010, 10:57 AM  #2 
Senior Member Joined: Nov 2010 Posts: 502 Thanks: 0  Re: Complex Numbers Question PLEASE HELP
Do you know De Moivre's formula?

December 12th, 2010, 11:53 AM  #3 
Newbie Joined: Dec 2010 Posts: 3 Thanks: 0  Re: Complex Numbers Question PLEASE HELP
(e^j?)^n=e^jn? isnt it? Am i right in thinking i could use this when im square rooting the e ( essentially to the power of 1/2) when i take the modulus, i.e. when i multiply out the first expression and then do z= sqr(x^2+y^2) ? 
December 12th, 2010, 01:06 PM  #4 
Newbie Joined: Dec 2010 Posts: 3 Thanks: 0  Re: Complex Numbers Question PLEASE HELP
hmm its still not working, im thinking i can rearrange sin(?)= 1/2j * (e^j? + e^j?) and make e^j? the subject. However whenever i try this i dont know how you end up with wT/2 in the bracket.

December 16th, 2010, 06:05 AM  #5 
Math Team Joined: Nov 2010 From: Greece, Thessaloniki Posts: 1,989 Thanks: 133 Math Focus: pre pre pre pre pre pre pre pre pre pre pre pre calculus  Re: Complex Numbers Question PLEASE HELP 

Tags 
complex, numbers, question 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Complex Numbers question (de Moivres)  carl17  Algebra  2  October 26th, 2013 10:55 AM 
complex numbers question  Bula  Algebra  1  March 27th, 2013 12:48 PM 
Insane complex numbers question  OriaG  Algebra  16  August 27th, 2012 02:20 PM 
Complex numbers question  TsAmE  Complex Analysis  11  November 17th, 2010 04:49 AM 
Insane complex numbers question  OriaG  Calculus  16  December 31st, 1969 04:00 PM 