Results 1 to 2 of 2

Math Help - Calculus III Vector problem

  1. #1
    Newbie
    Joined
    Sep 2010
    Posts
    7

    Calculus III Vector problem

    If anyone could help me with this I would really appreciate it.

    If vector u1 and vector u2 are orthogonal unit vectors and vector v=A(u1)+B(u2) find v dot u1

    I know that because u1 and u2 are orthogonal their dot product is equal to zero, but I'm not sure what to do beyond that.

    Thank you!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,884
    Thanks
    680
    Quote Originally Posted by vcf323 View Post
    If anyone could help me with this I would really appreciate it.

    If vector u1 and vector u2 are orthogonal unit vectors and vector v=A(u1)+B(u2) find v dot u1

    I know that because u1 and u2 are orthogonal their dot product is equal to zero, but I'm not sure what to do beyond that.

    Thank you!
    v = A(u_1) + B(u_2)

    v \cdot u_1 = [A(u_1) + B(u_2)] \cdot u_1 = A(u_1) \cdot u_1 + B(u_2) \cdot u_1 = A(u_1) \cdot u_1

    to finish ... what is the unit vector u_1 "dotted" with itself ?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Vector calculus: simple surface integral problem
    Posted in the Calculus Forum
    Replies: 2
    Last Post: May 25th 2011, 01:05 AM
  2. Vector calculus problem
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: April 22nd 2010, 09:24 AM
  3. vector calculus - vector feilds
    Posted in the Calculus Forum
    Replies: 3
    Last Post: February 25th 2010, 01:17 AM
  4. Replies: 4
    Last Post: August 31st 2009, 05:13 PM
  5. Vector Calculus problem
    Posted in the Calculus Forum
    Replies: 3
    Last Post: June 7th 2008, 10:38 PM

Search Tags


/mathhelpforum @mathhelpforum