
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
December 25th, 2017, 08:10 AM  #1 
Member Joined: Oct 2015 From: Greece Posts: 48 Thanks: 2  Complex Numbers Calculation Help!!!
Can you tell me what I did wrong? I really can't find the mistake! Here is my problem Also if you can't see it Ohms * Amperts = Volts The result should be: 144,3kv * angle(4,93) Last edited by skipjack; December 26th, 2017 at 12:34 PM. 
December 25th, 2017, 11:04 AM  #2 
Senior Member Joined: Jul 2012 From: DFW Area Posts: 625 Thanks: 88 Math Focus: Electrical Engineering Applications 
Hi babaliaris, I think that your calculation for $\large \tan^{1} \left (\frac{20}{6} \right )$ is incorrect. Using the value that I calculated, I arrived at the given answer. 
December 25th, 2017, 11:52 AM  #3  
Member Joined: Oct 2015 From: Greece Posts: 48 Thanks: 2  Quote:
At least now I know that my logic is correct. One more question. Can I do this calculation faster? Our Professor said to us "When you want to add two Complex Numbers, you use the Cartesian form and when you want to multiply you use the polar form." So every time when I do a calculation I need to convert the numbers from Cartesian form to polar and the opposite depending on what I'm doing. Last edited by skipjack; December 26th, 2017 at 12:35 PM.  
December 25th, 2017, 12:42 PM  #4  
Senior Member Joined: Jul 2012 From: DFW Area Posts: 625 Thanks: 88 Math Focus: Electrical Engineering Applications  Quote:
Last edited by skipjack; December 26th, 2017 at 12:36 PM.  
December 25th, 2017, 01:03 PM  #5 
Member Joined: Oct 2015 From: Greece Posts: 48 Thanks: 2  Yeah, probably this is the only way, but anyway thank you for your help!!!
Last edited by skipjack; December 26th, 2017 at 12:36 PM. 
December 26th, 2017, 12:28 PM  #6  
Global Moderator Joined: May 2007 Posts: 6,559 Thanks: 603  Quote:
Last edited by skipjack; December 26th, 2017 at 12:38 PM.  

Tags 
calculation, complex, numbers 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Can complex numbers (and properties of complex numbers) be..  jonas  Complex Analysis  2  October 13th, 2014 03:03 PM 
Complex coordinate bearing calculation problem, need help…  TheSwede  Algebra  0  January 10th, 2014 11:05 AM 
complex number calculation  cummings123  Complex Analysis  3  November 29th, 2012 12:41 PM 
Modulo calculation with large numbers  trid2  Number Theory  1  February 9th, 2009 05:14 AM 
Complex probability calculation  toltec7  Advanced Statistics  1  May 14th, 2008 07:30 PM 