# Homework Help: Formula of shortest distance between two skewed lines

1. Oct 11, 2014

### gxc9800

1. The problem statement, all variables and given/known data
kindly refer to the yellow highlighted part,
why is but not ?

2. Relevant equations

3. The attempt at a solution

#### Attached Files:

• ###### IMG_20141011_164815[1].jpg
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2. Oct 11, 2014

### HallsofIvy

??? The "yellowed part" says precisely the second: $$|AC|= |AB| cos(\theta)$$

3. Oct 11, 2014

### gxc9800

please refer to the lower part , it states that $$|AB|= |AB| cos(\theta)$$....... after eliminate |vector b1 x vector b2|

4. Oct 11, 2014

### HallsofIvy

No, there is nowhere, in what you posted, that says that.

5. Oct 11, 2014

### Staff: Mentor

From https://www.physicsforums.com/threads/guidelines-for-students-and-helpers.686783/

6. Oct 11, 2014

### Staff: Mentor

At the bottom of the third image you have |AC| = |AB|cos($\theta$)

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