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03182013, 07:57 PM  #1 (permalink) 
Seasoned Member Join Date: Oct 2009  Anybody good at math?
Figured I'd ask my math question here since i've had luck at it before. I'm not trying for you guys to do my math homework, but rather help me figure out how to do it for my test tomorrow. First type of problems: Convert from polar equation to rectangular equation. cis=cos+sin 3cis(pi/4) cis0 5cis(3pi/4) Etc Etc Second type of problem: Put in Polar Form: Z1Z2 Z1: 7cis(5pi/2) Z2: 8cis(3pi/4) Like I stated, I don't need the answers, I would simply like to know how to get there. Any help is appreciated!!
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03182013, 08:28 PM  #3 (permalink) 
Seasoned Member Join Date: Oct 2009 
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03182013, 08:29 PM  #4 (permalink)  
Banned Join Date: Oct 2006  Quote:
if no one else can help, refer to your textbook. sometimes they explain better than the teachers, depending on the teacher. what does your textbook say?  
03182013, 08:32 PM  #5 (permalink)  
Seasoned Member Join Date: Oct 2009  Quote:
Here's how to do the first set, I think, the second set I am still not sure of. Polar  rectangular conversion
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03182013, 08:33 PM  #6 (permalink) 
Educated Donkey 
I thought I was good at math...until I read this. Four year of calculus in college, and I have no idea what that is saying. (Now, I haven't used anything past fractions and basic algebra and geometry since college, so maybe I have just forgot it.)
Last edited by MrBig; 03182013 at 08:36 PM. 
03182013, 08:37 PM  #7 (permalink) 
Seasoned Member Join Date: Oct 2009  This is just precal graphing unit circle I doubt it's too complicated, just looks that way and has to be totally useless knowledge.
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03182013, 09:09 PM  #10 (permalink)  
Post Whore Join Date: Oct 2009  Quote:
But polar to rectangular coordinate conversions can be useful and has its applications. Its just really weird, when someone decides to throw in cis in there.  