Dot vs. Cross Product

[MrWalksinStorms]

"Perpindicular" is spelled perpendicular.

[edde8282]

Is the first letter always the index finger?

[runback1983]

i wonder if PatickJMT watches these videos...

[Zander101084]

I've got to stop looking at these videos, I really should be finishing my homework.

[chrisw142]

sin of smiley face?

[Kaleetos]

happy theta at 2:00

[retsubkcolb]

can someone link me to the next video

[cr656565]

@retsubkcolb go to the website.  its easier to follow the progression! khanacademy . org

[musicandmeareinlove]

thank you so much!! I managed to get an A1 in my exams just bcos of you :)

[TheReturnOfJames]

You sir are my hero. I wish my Calc teacher spoke with the same clarity and english composition as your video.

[Internetstore]

you're so good. I listen to my review instructor (i'm taking the Civil Engineering Board exams this may) for like 1 hr explaining and discussing and you make more sense than him in just 10mins? how's that? :)

[lennenfield]

thanks, that exactly how teaching should be done.

[tildyton]

This helped me understand the conceptual meaning of the cross and dot product functions.

[signinname41]

woa that arrow analogy for the cross product going into or out of the page is awesome. I wish i had had that when i was first being taught about current and magnetism and whatnotz.

[jacobu321]

The theta symbol paired with the first "Sin" looks like a smiley :)

[ermatty111]

very funny, light hearted and informative. perfect!

[CoreDump07]

smilie at 2:01 :D

[harj2009]

where does cos come from ?

[lihaiyun923]

good



[Henrickunit]

At 2:02 the theta looks like a laughing smiley.

[MoPar7055]

@Henrickunit i noticed that too

[wailinburnin]

Are you starting with an assumption that we are talking vectors? I thought dot product was like this: I walk a mile in an hour, how many miles can I walk in 3 hours? Scaler times a "thing" of some kind (dot product, a quantity). Cross product: basic electricity, V=IR. Suddenly two "things" are being multiplied together (current and resistence). Commonly, vector abstraction comes later. Isn't that the essential weirdness of reality, the cross product, emergence of a new "quality"?

[MatthewWelch6674]

thanks for the tips! I got lots of wicked MAC makeup from Gratis Makeup Samples - they'll last me ages!

[superroshan1]

PERFECTLY EXCELLENT...THANK  U ...

[endoras0666]

nice drawing..

great explanation

Thanks a lot

[alkalait]

around 7:00 it was a bit confusing cause in the sketch it seems like you are drawling a line perpendicular to b, not a (the little orthogonality square was hard to notice) and I said to myself "wait that is not possible, how didn't he notice THAT mistake?" heheh :)

[greenec3]

Thanks very much. Didn't get the dot product for so long, and in one video you gave it to me in such an nice and easy way to understand. Very helpfull. Wish I had you as a teacher in school ha

[leovalk]

Super! Thanks, Anneke

[crazymun13]

wow, very helpful!

[dattajack]

The picture of the turkey trying to fly away from the rabbit is great! 4:56

[giovanni9107]

9999 views! =D

[chemmeistr]

thanks man, i have a physics final tomorrow, and i finally understand this stuff

[MrGaucho1010]

wow man ur amazing in using the mouse to draw and explian and wrtie down :0 cool

[Amrod2k4]

he's not using a mouse. There are drawboards with a mouse pen.

[Acettc]

this is great! thanks so much; i especially liked the more conceptual stuff -- helped me apply a context to the concepts!

[ffddssaavvccxxzz]

mashalla thanks allot brother.....

[TyphoidHippo]

Wow, that was ridiculously helpful. Thank you.

[ChangeWasALie]

It's a good video but you must have had a bad cold when you recorded it. It's very distracting.

[pollardrho06]

Good job with the hand drawing

[acdudec]

thanks man, you did helped me, a lot, thank you very much

[loamobn]

4:00 to 6:00 is fun

[selpaksel]

you know what..

I always think of stuff..

and I mostly not satisfied with any explanations..

now I`m satisfied with ur explanation to this issue..

so... thank you? so much..

hope you keep makin vidz

[bordenw]

This video is awesome. I always wonder why the dot product has cos and cross product has sin. thank you so much

[MercifulBoss]

My textbook shows a very confusing addition and multiplacation of various point on a plane. When attempting to find the equation of a plane given three points on it using Cartesian Equations.

What is a simple method to calculate the equations of perpendicular planes, or planes and lines using either Cartesian Equation or Vector equation and how do I find the equation of a plane when given three points.

[herrplanck]

your videos are really helpful. thank you.

[hs1white]

Awesome looking forward to the next video