
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
June 15th, 2008, 04:15 AM  #1 
Newbie Joined: May 2008 Posts: 29 Thanks: 0  Complex number and polar form
Hello! in some engineering textbook, i have: j0.02/_50` = (1/_90`)(0.02/_50`) i dont understand this transition... where do they get (1/_90`) from? i know that j = 1/j, but that doesnt help me much in understanding of this transition... thanks in advance! 
June 15th, 2008, 12:25 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,929 Thanks: 2205 
Any complex number can be given in (r, ?) form (where r cos(?) is the real part and r sin(?) is the imaginary part). The above notation seems to be giving the value of r then "/_" and then ? in degrees (since "`" appears to mean degrees). Does that help?

June 22nd, 2008, 04:01 PM  #3 
Senior Member Joined: Dec 2006 Posts: 1,111 Thanks: 0  Re: Complex number and polar form
All complex numbers are also twodimensional vectors. Thus all the rules for adding, subtracting, scalar multiplying, switching from polar to rectangular forms and vice versa, etc., are applicable to complex numbers just as they are to any other vector, such as velocity vectors. I don't know what you are dealing with here, but it seems like you might be working with AC electricity phasors. Phasors are just complex numbers, and as such can also be represented as vectors, with all the properties of vectors being applicable to them. Look up the properties of vectors in a physics book, and they will also apply to all complex numbers as well.


Tags 
complex, form, number, polar 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Complex number, Polar to Cartesian form  chocolate  Algebra  10  November 21st, 2012 10:16 AM 
Polar to Complex Form  jtkjackie  Calculus  1  September 13th, 2012 11:25 AM 
Converting Polar to Complex Form  jtkjackie  Algebra  1  September 13th, 2012 10:12 AM 
Polar form of a complex number  Aiyla  Calculus  2  April 14th, 2012 01:56 PM 
Complex numbers to polar form  blackobisk  Algebra  1  April 16th, 2009 05:39 PM 