Question

Projecting 3D Position Vector / Point onto a Line That Doesn't Go Through Origin

score 185 · Answer 1 · 2026-03-29 13:46:52

185

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Projecting 3D Position Vector / Point onto a Line That Doesn't Go Through Origin

Published on 29 Mar 2026 - 13:46

score 86 · Answer 2 · 2026-03-27 20:19:55

86

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Prove that $\vec r ~\times \vec a = \vec 0 $ implies $\vec r ~\times \vec v = \vec c $, where $\vec c$ is a constant vector.

Published on 27 Mar 2026 - 20:19

score 169 · Answer 3 · 2026-03-27 20:21:13

169

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If $\vec r \times v = \vec c$, where $\vec c$ is a constant vector, prove that the motion takes place in a plane.

Published on 27 Mar 2026 - 20:21

score 70 · Answer 4 · 2019-07-26 16:19:48

70

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Triangular law of vector addition

Published on 26 Jul 2019 - 16:19

score 937 · Answer 5 · 2019-07-28 00:15:24

937

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Why must the plane go through the origin?

Published on 28 Jul 2019 - 0:15

score 63 · Answer 6 · 2026-04-07 17:24:21

63

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How to simplify $A^{-1}a\cdot A^Tb$?

Published on 07 Apr 2026 - 17:24

score 778 · Answer 7 · 2019-07-29 02:30:33

778

Views

multiplying both sides of a linear equation

Published on 29 Jul 2019 - 2:30

score 457 · Answer 8 · 2019-07-30 02:26:54

457

Views

Find a vector in the plane spanned by two 4D vectors

Published on 30 Jul 2019 - 2:26

score 229 · Answer 9 · 2026-03-27 14:28:36

229

Views

Range of $|a+b|$ given $a = ⟨15,-8⟩$ and $|b| = 12$

Published on 27 Mar 2026 - 14:28

score 646 · Answer 10 · 2019-07-30 05:09:54

646

Views

Vectors and ratios

Published on 30 Jul 2019 - 5:09

score 116 · Answer 11 · 2019-07-30 13:03:19

116

Views

Show that in space $\mathbb R^3 $ the vectors $x=(1,1,0), y=(0,1,2) $ and $z=(3,1,-4)$ are linearly independent

Published on 30 Jul 2019 - 13:03

score 315 · Answer 12 · 2019-07-30 18:04:02

315

Views

Simplest way to find a perpendicular vector to a vector without using cross product

Published on 30 Jul 2019 - 18:04

score 81 · Answer 13 · 2026-03-26 06:15:14

81

Views

Linear independence of a set of vectors + orthonormal basis

Published on 26 Mar 2026 - 6:15

score 1.8k · Answer 14 · 2026-02-23 02:59:29

1.8k

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How to use Vectors to find the centroid of a tetrahedron?

Published on 23 Feb 2026 - 2:59

score 70 · Answer 15 · 2019-08-01 18:00:25

70

Views

What is the number of possible combinations of d nonnegative integer numbers from 0 to N such that the sum equals N (and order matters)?

Published on 01 Aug 2019 - 18:00

List Question

Projecting 3D Position Vector / Point onto a Line That Doesn't Go Through Origin

Prove that $\vec r ~\times \vec a = \vec 0 $ implies $\vec r ~\times \vec v = \vec c $, where $\vec c$ is a constant vector.

If $\vec r \times v = \vec c$, where $\vec c$ is a constant vector, prove that the motion takes place in a plane.

Triangular law of vector addition

Why must the plane go through the origin?

How to simplify $A^{-1}a\cdot A^Tb$?

multiplying both sides of a linear equation

Find a vector in the plane spanned by two 4D vectors

Range of $|a+b|$ given $a = ⟨15,-8⟩$ and $|b| = 12$

Vectors and ratios

Show that in space $\mathbb R^3 $ the vectors $x=(1,1,0), y=(0,1,2) $ and $z=(3,1,-4)$ are linearly independent

Simplest way to find a perpendicular vector to a vector without using cross product

Linear independence of a set of vectors + orthonormal basis

How to use Vectors to find the centroid of a tetrahedron?

What is the number of possible combinations of d nonnegative integer numbers from 0 to N such that the sum equals N (and order matters)?

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