Results 1 to 2 of 2

Math Help - calculs equations

  1. #1
    Newbie
    Joined
    May 2012
    From
    Greece
    Posts
    8

    calculs equations

    sketch the curve and find its arc length:
    r(t)=(cos t, sin t, 6t), 0≤ t ≤ 2π
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    15,572
    Thanks
    1411

    Re: calculs equations

    You have posted something like 6 or 7 problems with no indication that you have made any attempt yourself. Many of them involve very basic integration rules from Calc I but "arc length" is typically a Calc III topic. Here, the first thing you should have observed is that x^2+y^2= cos^2(t)+ sin^2(t)= 1 so the projection of the curve onto the xy plane is a circle. What does z do while x and y are "circling"?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 6
    Last Post: November 30th 2011, 01:41 AM
  2. Replies: 3
    Last Post: February 27th 2009, 07:05 PM
  3. Replies: 1
    Last Post: September 1st 2007, 06:35 AM
  4. Replies: 1
    Last Post: July 29th 2007, 02:37 PM
  5. Replies: 3
    Last Post: July 9th 2007, 05:30 PM

Search Tags


/mathhelpforum @mathhelpforum