Angle Between Diagonals of a Cube (Ch2 Pr3)

This video explains how to find the angle between vectors using the dot product. This technique is applied to find the angle between the diagonals of a cube. This is Chapter 2 Problem 3 of the UNSW MATH1141 Algebra notes. Presented by Geoff Carroll of the School of Mathematics and Statistics, UNSW.

[saeedbaig]

Watch at 1.5 speed. The explanation's good, but he goes WAY slower than he needs to.

[basset]

Quality video, better than every french learning video i've seen well done 🤩🤩

[lauraflores]

great video!! you are an awesome teacher!

[dipakpadhy]

Sir I have a question, another angle can be found if we take nagative of one of vector.

[KapidhwajSonithB]

But why the angle between the diagonals is not 90° ???

[samvelaghajanyan]

Great explanation really appreciate it, thank you

[afachannel]

if the point of intersection is point R, why is theta GRF, not ORG?

[ryanryotbownds]

fwiw; The points written down don't correspond with the diagram. I tried to draw the cube myself but it appears you skipped writing point B and gave point b's co-ordinates to C

[chilllife]

American university, there is too much in this questions .
India your class 10 students here is your homework pretty easy everyone should be able to do .

[jamesbalajan]

Notice that the question itself says that there are 8 vertices, however only lists 7, neglecting B.
Furthermore, the value of B on the diagram is given to C in the question.

Good video otherwise.