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Polar coordinates


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#1 Ares

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Posted 26 April 2004 - 11:32 PM

Hello
i just reviewed in my calc class polar coordinates and the fact that some problems such as r=4cos 2(theta) (this equation may be wrong its suppose to be a circle don't have the book on me or a grapher) and r=Pi/3 only have one mathimatical intersection however when graph they clearly have 2. This really is bothering me that it doesn't make sence and that something else must be left out.

I understand that a point may have a infinite amount of coordinates for it but it just doesn't quite make sence why only a finite work and seems that even fewer if any work out mathimatically.

Hope that made some sence at what i am trying to get at.
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p.s. I love this site just found it a few days ago.

#2 Tim_Lou

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Posted 27 April 2004 - 01:04 PM

i might be able to help you out ......sry but i dont really understand what your askinng.

?????

#3 Gill_105

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Posted 28 April 2004 - 07:32 AM

I dont understand you either...

But I do know that 4*cos(2*theta) sure as hell doesn't graph a circle.