Mathematics Thread

Discussion in 'Off Topic' started by Supa_Cop_Killa, Mar 25, 2012.

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  1. Directrix looks like a line perpendicular to the axis of symmetry. So for all parabolas that ate functions, it's a horizontal line

    The latus rectum is a horizontal line segment connecting the focus to the parabola. Unless its not a function. Yours should all be functions.

    You can use google if you need to see it. Google is good for math if you have a question about the definition of a word. If you don't know how to solve something then that is harder to find on google.
     
    #41 Supa_Cop_Killa, Mar 25, 2012
  2.  
    #42 Azarah6, Mar 25, 2012
  3. 4p equals the lattus rectum. it's the horizontal distance from one side of the parabola to the other, going through the focal point
     
    #43 -PA_iNathanAmPeterPan-, Mar 25, 2012
  4. I think
     
    #44 -PA_iNathanAmPeterPan-, Mar 25, 2012
  5. In the pictures I see, the directrix is a horizontal line below the parabola
     
    #45 Supa_Cop_Killa, Mar 25, 2012
  6. I know the directrix is equidistant from the vertex as the focus is. I just don't know how to find it!
     
    #46 Azarah6, Mar 25, 2012
  7. I think nwain is right. Lol sorry I've never had to do any of this in my math classes 
     
    #47 Supa_Cop_Killa, Mar 25, 2012
  8. I thought the directix was the distance from the focal point to the vertex? I don't remember much of this
     
    #48 -PA_iNathanAmPeterPan-, Mar 25, 2012
  9. Well if you know the focus point and know the vertex, double the distance between them to get the y coordinate of the directrix. Since the directrix is horizontal then you know the equation is going to be y=a constant

    I figured this out from your post Azarah 
     
    #49 Supa_Cop_Killa, Mar 25, 2012
  10. Ohhh I remember now. The directix is the horizontal line equidistant from the the vertex as the focal point but on the other side of the vertex
     
    #50 -PA_iNathanAmPeterPan-, Mar 25, 2012
  11. The focal point to the vertex = directrix to vertex 



    Thaaaaanks Unicorny.
     
    #51 Azarah6, Mar 25, 2012
  12. That's the same thing nwain
     
    #52 Supa_Cop_Killa, Mar 25, 2012
  13. No  lmao
     
    #53 Supa_Cop_Killa, Mar 25, 2012
  14. Well kinda I guess  that's presented weird
     
    #54 Supa_Cop_Killa, Mar 25, 2012
  15. Sorry I didn't answer the question
     
    #55 -PA_iNathanAmPeterPan-, Mar 25, 2012
  16. Lol I think I'm starting to understand this now
     
    #56 Supa_Cop_Killa, Mar 25, 2012
  17. I am better at calculus and stuff I have taken more recent 
     
    #57 Supa_Cop_Killa, Mar 25, 2012
  18. Man, why plus sign no work! 

    What is 1 1=
     
    #58 -Nephirus-, Mar 25, 2012
  19.  good to know!
     
    #59 Azarah6, Mar 25, 2012
  20. Lol neph look at the bold on first page
     
    #60 Supa_Cop_Killa, Mar 25, 2012
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