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!

Plotting surfaces in 3-space

  1. Feb 23, 2015 #1
    1. The problem statement, all variables and given/known data
    Given the eqn x=2, y=sin(t), z=cos(t), draw this function in 3-space.

    2. Relevant equations

    3. The attempt at a solution
    I did this:
    Therefore we get x^2+y^2+z^2=5
    Which is the eqn of a sphere with radius root5.

    My friend said it's supposed to be a circle but I can't see how?
    Which one of us is right if either.
  2. jcsd
  3. Feb 23, 2015 #2


    User Avatar
    Science Advisor

    If x is always equal to 2, how can it be a sphere?
  4. Feb 23, 2015 #3
  5. Feb 24, 2015 #4


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Another way of looking at it... there is only one degree of freedom (t), so it must be a line, not a surface.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Plotting surfaces in 3-space
  1. Cal 3; surfaces (Replies: 2)