1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Surface area inside an elliptic cylinder

  1. Nov 18, 2009 #1
    1. The problem statement, all variables and given/known data

    Find the surface area of that part of the plane 8x+3y+z=9 that lies inside the elliptic cylinder (x^2/64) + (y^2/9) =1

    2. Relevant equations

    not sure what equations i need to use. probably parametrization of a region

    3. The attempt at a solution

    i'm not quite sure how to start this problem. how do i related the elliptic cylinder with the plane?
  2. jcsd
  3. Nov 18, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hi MasterWu77! :smile:

    You could just say it's a projection, and divide the base area of the cylinder by the appropriate cosine. :wink:
  4. Nov 18, 2009 #3
    ok but how would i say that it is a projection and what exactly do you mean by the appropriate cosine?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook