Understanding Parametric and Symmetric Equations in 3-Space

In summary, the conversation discusses a homework question about a line in three-dimensional space that is parallel to the xy plane but not any of the axes. The question asks about the implications of this for the parametric and symmetric equations in three dimensions. The conversation also mentions the use of direction vectors and normal vectors to describe the line. Finally, the full question from the textbook is provided for context.
  • #1
mikee
30
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Homework Statement

hello i just had a quick question, Supose there's a line in three space that is parralel to the xy plane but not any of the axes, what does this indicate about the parametric and symmetric equations in three space.



Homework Equations





The Attempt at a Solution

I am not positive on the answer but i was thinking for the parametric equation the direction vector would be perpendicular to the xz and zy plane and the normal vector for the xy plane would be parralel to any of the other planes
 
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  • #2
It confusing because you are using planes to describe the line.

One thing for sure, the direction vector would be (a,b,0)

I think they just want to see that you have 0 for z in the direction vector and
(x-x0)/a = (y-y0)/b = ?
 
  • #3
Yeah, I think it's best you post the question from the book, otherwise we won't know what exactly you're asking for.
 
  • #4
Recall that there are three coordinates planes in 3-space. A line in R3 is parallel to xy-plane, but not to any of the axes. Explain what this tells you about parametric and symmetric equations in R3. Support your answer using examples. ok that's the full question
 

FAQ: Understanding Parametric and Symmetric Equations in 3-Space

What is the concept of "planes in 3 space"?

"Planes in 3 space" refers to a geometric concept in which a two-dimensional surface is positioned within a three-dimensional coordinate system. This allows for the representation of flat surfaces within a three-dimensional space.

How are planes in 3 space represented mathematically?

Planes in 3 space can be represented using a vector equation, in which a point on the plane and two direction vectors are used to describe the location and orientation of the plane. Alternatively, a Cartesian equation can be used, in which the x, y, and z coordinates of points on the plane are represented in terms of constants and variables.

What is the relationship between planes and lines in 3 space?

Planes and lines in 3 space are closely related, as a line can intersect a plane at a single point or be contained within the plane. Additionally, two distinct planes can intersect in a line. The position and orientation of a plane can also be described using a line perpendicular to the plane, known as the normal vector.

How are planes in 3 space used in real-world applications?

Planes in 3 space have numerous applications in fields such as engineering, physics, and computer graphics. They are used to model and analyze complex structures, such as airplane wings and building structures. They are also used in computer graphics to create 3D objects and simulate real-world environments.

What are some common properties of planes in 3 space?

Some common properties of planes in 3 space include their orientation, position, and distance from the origin. They can also be described by their normal vector, area, and angle of intersection with other planes. Additionally, planes can be translated, rotated, and reflected in 3 space using various geometric transformations.

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