
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
December 27th, 2017, 04:09 AM  #1 
Senior Member Joined: Oct 2015 From: Greece Posts: 137 Thanks: 8  Complex Number to Polar form with Real = 0!!!
Hello! I have this complex number: $0 + j\times 89,75$ Our professor told us $0 + j\times 89,75$ to polar is: $89,75\angle 90$ He also told us Cartesian to polar convertion: $\sqrt{a^{2}+b^{2}}\angle{\tan^{1}(b/a)}$ So let's convert $0 + j\times 89,75$ to polar: First of all $\sqrt{a^{2}+b^{2}} = \sqrt{0^{2}+89,75^{2}} = 89,75$ but: $\tan^{1}(b/a)$ , a = 0!!!!! So how? Last edited by skipjack; December 27th, 2017 at 09:22 AM. 
December 27th, 2017, 06:36 AM  #2  
Math Team Joined: Jul 2011 From: Texas Posts: 3,034 Thanks: 1621  Quote:
 
December 27th, 2017, 03:15 PM  #3 
Senior Member Joined: Sep 2016 From: USA Posts: 669 Thanks: 440 Math Focus: Dynamical systems, analytic function theory, numerics 
You can't learn math if you still think its just a bunch of formulas. Put down the formula and just look at the vector you have written and tell me its polar angle. Once you do this, you will easily see how to correct the formula to account for this case.

December 28th, 2017, 12:21 PM  #4  
Senior Member Joined: Oct 2015 From: Greece Posts: 137 Thanks: 8  Quote:
Sometimes you need to think before you ask something i guess  

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

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Convert complex number to polar form.  grigorovludmil  Linear Algebra  3  November 16th, 2016 04:30 AM 
write complex number in a+bi form with a and b real  wortel  Complex Analysis  2  October 31st, 2016 08:51 PM 
Complex number, Polar to Cartesian form  chocolate  Algebra  10  November 21st, 2012 10:16 AM 
Polar form of a complex number  Aiyla  Calculus  2  April 14th, 2012 01:56 PM 
Complex number and polar form  BlackOps  Algebra  2  June 22nd, 2008 04:01 PM 