Formula of shortest distance between two skewed lines

In summary: AB| = |AB|cos(##\theta##). This means that the highlighted part is asking why |AC| is equal to |AB|cos(##\theta##) but not equal to |AB|, as stated in the lower part. In summary, the highlighted part is questioning why |AC| is equal to |AB|cos(##\theta##) but not equal to |AB|, as stated in the lower part.
  • #1
gxc9800
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0

Homework Statement


kindly refer to the yellow highlighted part,
why is
IE4YzJD.jpg
but not
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?

Homework Equations

The Attempt at a Solution

 

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  • #2
? The "yellowed part" says precisely the second: [tex]|AC|= |AB| cos(\theta)[/tex]
 
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  • #3
HallsofIvy said:
? The "yellowed part" says precisely the second: [tex]|AC|= |AB| cos(\theta)[/tex]
please refer to the lower part , it states that [tex]|AB|= |AB| cos(\theta)[/tex]... after eliminate |vector b1 x vector b2|
 
  • #4
No, there is nowhere, in what you posted, that says that.
 
  • #5
From https://www.physicsforums.com/threads/guidelines-for-students-and-helpers.686783/
5. Do not simply post images of the problem statement or your work. While posting images may be convenient for you, it's actually one of the most effective ways of getting your request for help ignored. Images are often too big, too small, rotated, upside down, out of focus, dimly lit, or of otherwise poor quality, and your handwriting probably isn't as easy to read as you think it is. Images are a hindrance to the helpers as portions of the problem statement or your work can't easily be quoted. Using images also doesn't qualify as filling out the homework template, so your post may be deleted.
 
  • #6
gxc9800 said:
please refer to the lower part , it states that [tex]|AB|= |AB| cos(\theta)[/tex]... after eliminate |vector b1 x vector b2|
At the bottom of the third image you have |AC| = |AB|cos(##\theta##)
 

Related to Formula of shortest distance between two skewed lines

1. What is the formula for calculating the shortest distance between two skewed lines?

The formula for calculating the shortest distance between two skewed lines is given by d = |a1(x2-x1) + b1(y2-y1) + c1| / sqrt(a1^2 + b1^2), where (x1,y1) and (x2,y2) are any two points on the two lines and a1, b1, and c1 are the coefficients of the first line's equation in standard form.

2. Why is the shortest distance between two skewed lines important in mathematics and science?

The shortest distance between two skewed lines is important because it allows us to determine the closest possible distance between two non-parallel lines, which can be useful in various applications such as geometry, robotics, and computer graphics.

3. Can the shortest distance between two skewed lines be negative?

No, the shortest distance between two skewed lines cannot be negative. The shortest distance is always a positive value, as it represents the shortest length between the two lines.

4. How is the shortest distance between two skewed lines different from the shortest distance between two parallel lines?

The shortest distance between two skewed lines is different from the shortest distance between two parallel lines because parallel lines never intersect, so their shortest distance is always the same and can be calculated using simple geometry. On the other hand, two skewed lines may intersect at a single point or have no intersection at all, making the calculation of the shortest distance more complex.

5. Are there any real-life applications of the formula for the shortest distance between two skewed lines?

Yes, there are many real-life applications of this formula. Some examples include calculating the shortest distance between two roads, determining the closest distance between two airplanes in flight, and finding the shortest distance between two lines of sight in surveying and navigation.

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