Recent content by PTX-14

Thank you two, I guess it's time for me to go back and audit some pre-algebra classes... :)

I was reading on planetary motion and have gotten hung up on a "rearrangement of terms" that the author skimmed over. It reads that: r=e(k+rcos(θ))=(ek)/(1-ecos(θ)) It's been a while since I've been in a math class: I just can't follow how to get from a to b. Is there anyone who can walk...