Results 1 to 3 of 3

Math Help - co-ordinate

  1. #1
    Newbie
    Joined
    Jul 2009
    Posts
    23

    co-ordinate

    ABC on (Oxy) have bisector AD: x-y+2=0 ,
    and BF: 4x+3y-1=0,
    and H(-1;-1). Find co-ordinate of C ?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    Joined
    Jun 2009
    Posts
    806
    Thanks
    4
    Quote Originally Posted by mp3qz View Post
    ABC on (Oxy) have bisector AD: x-y+2=0 ,
    and BF: 4x+3y-1=0,
    and H(-1;-1). Find co-ordinate of C ?
    What is the meaning of this statement?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member
    Joined
    Jan 2009
    Posts
    591
    Quote Originally Posted by mp3qz View Post
    ABC on (Oxy) have bisector AD: x-y+2=0 ,
    and BF: 4x+3y-1=0,
    and H(-1;-1). Find co-ordinate of C ?
    We are given the equation for line BF.
    We are given the equation for line AD.
    Line AC is perpendicular to BF.

    A little math
    \angle CAD = 8deg 7min 48sec
    Which is half the angle CAB.

    Thus we know the equation of line AB.
    It is required that Line CH be perpendicular to AB.

    The equation for Line CH: y = \frac {-3x}{4} - \, 1.75

    Since H is not restricted to being on the line AB, the point C can occur anywhere on the line.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Mid-Ordinate Rule
    Posted in the Calculus Forum
    Replies: 2
    Last Post: February 17th 2010, 03:57 AM
  2. co ordinate geometry
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: November 25th 2008, 01:02 PM
  3. co-ordinate geometry
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: September 26th 2008, 12:52 PM
  4. Co-ordinate Geometry Help Please
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: July 18th 2008, 04:39 PM
  5. co-ordinate geometry
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: November 23rd 2006, 07:08 AM

Search Tags


/mathhelpforum @mathhelpforum