i've been working on this following question for ages and I wondered if anyone can help

The curve is defined in the polar coordinates:

http://www.mathhelpforum.com/math-he...97a8c47a-1.gif = 3/(1+cos(phi))

write the equation for this curve in the cartesian system of coordinates.

plot this curve. what is the name of the curve?

I probably can do the last bits once I can get the equation