Results 1 to 2 of 2

Math Help - Another directional derivative question

  1. #1
    Senior Member
    Joined
    Apr 2010
    Posts
    487

    Another directional derivative question

    The question
    Find the directional derivative of:
    f(x, y, z) = x arctan(y + z)
    at P(1, 0, 1) in the direction of i + j − k

    I got \frac{\pi}{4\sqrt{3}}

    Is this correct? I don't have solutions.

    Thanks.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    10,054
    Thanks
    368
    Awards
    1
    Quote Originally Posted by Glitch View Post
    The question
    Find the directional derivative of:
    f(x, y, z) = x arctan(y + z)
    at P(1, 0, 1) in the direction of i + j − k

    I got \frac{\pi}{4\sqrt{3}}

    Is this correct? I don't have solutions.

    Thanks.
    Unrationalized, but correct.

    -Dan
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Simple question about directional derivative
    Posted in the Differential Geometry Forum
    Replies: 4
    Last Post: October 10th 2011, 03:39 PM
  2. A question about partial derivatives and directional derivative.
    Posted in the Differential Geometry Forum
    Replies: 8
    Last Post: February 25th 2010, 04:05 PM
  3. Directional Derivative Question
    Posted in the Calculus Forum
    Replies: 3
    Last Post: November 4th 2009, 04:36 PM
  4. Directional Derivative
    Posted in the Calculus Forum
    Replies: 1
    Last Post: February 27th 2009, 04:29 AM
  5. Total Derivative vs. Directional Derivative
    Posted in the Advanced Math Topics Forum
    Replies: 5
    Last Post: May 30th 2008, 08:42 AM

Search Tags


/mathhelpforum @mathhelpforum