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Eccentricity e=sqrt(2), and one vertex is located at (2,0).

I do know that if the vertex is located at (2,0), then the directrix is 2 units from the vertex. I am not sure how to find the location of the directix, and above all translate this into the polar equation r= (ed)/(1+ecos(x)). Any help would be greatly appreciated.

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Since you are new to this site, please consider reading this: How to ask a homework question?. In particular, you should use homework tag if your question comes from a homework. I wrote this comment because the question sounds homework-like. –  Julian Kuelshammer Oct 24 '12 at 5:55
    
Thank you. I'll make sure to follow this for next time. –  Heath Huffman Oct 24 '12 at 7:55
    
You can also do it this time by clicking on retag. –  Julian Kuelshammer Oct 24 '12 at 10:59
    
Done and done. Thanks for the help! –  Heath Huffman Oct 24 '12 at 17:28
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