Results 1 to 5 of 5

Math Help - Elevation

  1. #1
    Junior Member
    Joined
    Dec 2008
    Posts
    58

    Elevation

    He went 4 miles to the west and again went 2 miles to north west. how many miles did he go from the initial point.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor Unknown008's Avatar
    Joined
    May 2010
    From
    Mauritius
    Posts
    1,260
    If you made a simple sketch, I'm sure you'll see it better. The two different paths he took make two lines, and the total distance he is from his initial point makes a third line. In all, they make a triangle.

    Since you know the directions he took, you'll see that the angle between the first two sides is 90 + 45 = 135 degrees.

    Then, use the cosine rule to find the length of the last side of the triangle, which gives \sqrt{4^2 + 2^2 - 2(4)(2)cos(135)} = 5.6\ miles

    Now, to find the direction from which he is from the initial point is obtained using the sine rule.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Dec 2008
    Posts
    58
    can you give me its picture ?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor Unknown008's Avatar
    Joined
    May 2010
    From
    Mauritius
    Posts
    1,260
    Here it is:

    Elevation-test.png
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Dec 2008
    Posts
    58
    Thanks a lot
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Angle of Elevation
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: September 19th 2009, 04:48 AM
  2. Help with angle of elevation
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: August 29th 2009, 11:18 AM
  3. elevation
    Posted in the Trigonometry Forum
    Replies: 7
    Last Post: July 30th 2009, 07:53 PM
  4. Elevation ????
    Posted in the Algebra Forum
    Replies: 2
    Last Post: April 1st 2009, 07:31 AM
  5. Weight Elevation
    Posted in the Pre-Calculus Forum
    Replies: 7
    Last Post: April 11th 2008, 07:47 PM

Search Tags


/mathhelpforum @mathhelpforum