Sign up ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

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.

share|cite|improve this question
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

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.