Vectors - Finding Magnitude or Length

[FirstGradeCalculus]

You're a great teacher!!!

[patrickJMT]

@FirstGradeCalculus thank ya ; )

[20BeautifulThing11]

AWW super helpfull ha ha never thought i would watch a video out of frustration towards Trigonometry!!! its not hard just confusing!!!! but it really helped thanks!!!

[Jovenza2]

Very helpful, thank you.

[AzharKhan2011]

helpfull



[ddres121]

good stuff

[donotlaugh1]

thank you, was a huge help saved my life !

[Fisherdec]

This was helpful, however I wish you would have given an example of a vector that has a point with 2 dimensions, ie. vector = 1, 5,(1,-2)) I can't figure out the base formula. delta(x) = sqrt((x-y)^2 +(y-x)^2 +(???)). I don't know whether it is -x or +x or -y or +y for the third term under the radical.

[damnbdboy]

great video. Just a little confused about notation. When u find the magnitude, do you have to put the vector sign on top of a(whatever letter)? or it doesn't matter?

[wareye12]

Is there any specific order i should watch these videos? Awesome videos btw they really helped me alot, I'm taking advanced physics this year but I didn't take advanced math last year so i have to learn this by myself :D

[ultimatebman]

Thank you so much, you helped me finally understand vectors! :D

[taibe0041]

that was helpful



[metallica04100]

This is so great. I learned everything in Pre-Calculus class from the past week in a half hour. It's not even because I have a bad Pre-Cal teacher. It's just that it's so helpful to be able to rewind if I accidentally spaced out or go forward if I already understand something. I can learn math at my own pace, which actually makes it kind of interesting...but still not as interesting as guitar!

[TheBjmccullough]

Thanks Patrick!

[PBjess96]

PATHAGIEM THOREY! i wrote this befor you said it lol im 14 and learning prgramming so im just stuying up as you can see its friday so im not sure if its normal for a 14 year old to actualy want to learn?

[kiminokami]

@PBjess96 He never said that.  He said "Pythagorean Theorum."

[Brittanity]

Thanks so much. My teacher dosen't make any sense

[ravishlystunning]

@Brittanity Even Mine 2..! Dey Kinda Freak me out wid wat dey teach!

[hareshborntodie]

thanks!

[xjtluvrx]

THANK YOU. I just learned more in the first minute of this video than I have combing my notes and precal book.

[Sidowse]

Heavy? weight has nothing to do with it!

[multipurpose101]

Firstly, THANK YOU SO MUCH FOR THESE HELPFUL VIDEOS. I have yet to view the ones on your Chess Channel. Secondly, shouldn't there be an arrow/headgear/dash above b in |b| at 2:34 ?

[patrickJMT]

@multipurpose101 yes, there should be some indication it is a vector; i probably got lazy/forgot

[DirrrtyDutchMTRFCKR]

Sometimes I see ||a||. What does that mean? Is that the same as |a| ? I'm kinda confused with vectors and complex numbers :S Is the modulus the same as the length or something?

[patrickJMT]

@DirrrtyDutchMTRFCKR i always saw that to mean the norm, which in this case, is the same thing as the length.

[VvVolComvV]

what about if there are radical?

[TheWalrus057]

You're the best! Thank you! 

[sinus2alfa]

u know everything about math , don't u??:|

[BlackShunk]

Thanks alot your tutorials are helping me through my game programming at university.

[vd853]

Will this work with vectors somewhere in space and not pointing off origin?

[saifulisfree]

I've followed your videos since sophomore year in High school- From Precalculus, to AP AB, to AP BC, all the way to Multivariable- Bottom of my heart -Thanks

[MovieDirectorUncut]

I can't understand my linear algebra proff too well so these videos really help.

Thanks for putting in the time and effort.

[Tinnguyen123]

i love your video.. >.< helped me pass calc 2 and now im here for calc 3 AGAIN =D

[chiffon903]

Thanks this does help a lot!

Internet is just amazing isn't it

[patrickJMT]

@chiffon903 it sure is!

[waspy89]

I think you should win a teaching award or the nobel peace prize or something! :) You have improved so many peoples' grades including me.

[patrickJMT]

@waspy89 ha! i think the internet as a learning tool has still not caught on with many, amazingly...

[MrCaCal]

thx sooo much for ur vids!!! U Saved me!!!!!!!!!!!!!! deff recomending to my friends!

[ZAKK9090]

I just spent two semesters of college watching your calculus videos only to discover you have more videos for physics just in time for my summer physics class.

You're awesome. Love these vids.

[patrickJMT]

@ZAKK9090 ya - vectors are super useful for physics! i might actually learn it all (physics that is) a bit better and do some physics vids, but i just have so much math i want to do first...

[alysha027]

you are left handed!!

sorry, that gets me excited! :P

[starstarstar42]

Yeah, this happened to my cousin. He was just chillin' on the corner when suddenly, BAM!  Math. He might never walk again.

[flyingbeagles]

Have you ever found it difficult to be left handed?

[torktt]

Merci beaucoup!!

Grâce à vous, je suis un étudiant le plus intelligent dans la classe de maths.

Bien que je peux pas parler l'anglais, vous explique dans un maniére très simple.

Merci de Canada!

[DigitalGangsterz]

Very helpful video to refresh my memory for Physics 4U class, thanks!

[akstylah]

You are the Michelle Phan of the math world!

[erlcom]

Great :)

[xxKrazy2nRxx]

I didn't get into Calculus till my junior year, which was last year and currently I'm taking 2nd year calc... or B/C as some people know it as. It also depends on your teacher cause we're right about done with all the lessons and we barely learning about this...")

P.S.- I'm a Mexican taking Calculus....crazy ain't it...lol....that's gacho man.

[patrickJMT]

@xxKrazy2nRxx almost as amazing as someone from kentucky doing math....

[1950yarr]

@patrickJMT now that is amazing!

[1950yarr]

@patrickJMT ...now that is amazing

[NapkinFreak]

@japanakos23

despite popular belief, not ALL americans are retarded...i'm 15 and i'm learning this stuff now...

[japanakos23]

@NapkinFreak

no nothing like that, i actually want to know when you ppl learn these, nothing more

if you feel that way, your problem

[Snorgteez]

@NapkinFreak im learning this starting today and im 14

[japanakos23]

just to compare the stuff you learn with my education system

[japanakos23]

i'm from greece and i have one question for the american students. how old are you when you learn these?no offense or anything :)

[firmkillernate]

@japanakos23

I'm 18 and currently taking Calculus II. I was 17 (Senior, or last year in high school). Some people take college courses during the summer in high school to complete Calculus in their 3rd year of high school.

Also, depending if they take the AP (Advanced Placement) class, they can take the AB test to fulfill the requirements for Calculus I or the BC test to fulfill the requirements for Calculus II. This will place them into Calculus II/III when they get to college.

[girlmm020304]

same question :)

[pretzels713]

i am currently 16. why?

[patrickJMT]

well, it depends.

i did not learn this stuff til i was a sophomore in college, so i guess i am clearly pretty stupid, eh?

[petroljunky]

@japanakos23 I was a sophomore in high school, but math is my thing. I missed like half of the days though because of migraines :( so I need to fill in the gaps. Thanks to Patrick, this is pretty easy to do.

[NastyMeowth]

thanks for being so helpful :)

[ashleypina1]

I like the way you curve your square roots to make the numbers beneath the square root to look as if their boxed in :P Nice tutorial on 3d vectors BTW!

[seonah1994]

thank you :)

[arhwhyayehn]

Excellent video. 5/5 Simple and accurate!

Thanks

[ArrudA666]

tell that to a theoretical physicist

[pretzels713]

exactly. only theories

[ArrudA666]

you should remember to represent the final magnitude with a "plus or minus " sign outside the radical because a negative number squared becomes positive

[tigers767]

But length's can't be negative

[dk0r51]

I believe the sign of the magnitude of a vector would be dependent upon the coordinate system..

[mail2chinnyn]

you're awesome!!!!!! thnx!!!

[kasejkras]

oh my gosh THANK YOU!

[wrathofcell]

You helped me alot sir, IM going to continue to watch your videos!

[dblthefist]

This man is a god HAVE MY CHILDREN!

[rctriplefresh5]

at 56 seconds ihad no idea why yo uwere subtracting 0. i did understand your numbered examples though.

[judyrosati]

Thank god for Patrick ;D! ;D

Well done! I love your videos - I should thank you for my A grades :D.

[illa2015]

i'm so happy you have videos on vectors!! haha i was super nervous that you wouldn't. in my school the course is calculus & vectors so we do intro to calculus (derivative, related rates, integration, curve sketching etc.) and than go into vectors

[PoliticsAdInfinitum]

AB is a vector whose tail is at (-4,2) and whose head is at (-1,3).

AB is a vector whose tail is at (-4,2) and whose head is at (-1,3).

Can u do that patrick, Need help

[davidenelson]

hey this video was made on my birthday

[patrickJMT]

i made it for you

[Necrozaur]

we usually do this stuff in romania in the 9-th class at a ordinary maths-info hi -school.......pretty tough ah? it's killing me

[TPSkinny]

Thank you so freakin much, my teacher definitely didn't go over this very well.

[patrickJMT]

usually do not see vectors for a while in calculus....

[dracolaangelicasongs]

I was thinking that. I haven't gotten past calculus 1 and probably won't because I only need to take calc 1 and a biostats class in place of calc 2.

[dracolaangelicasongs]

Hey! Which math subject introduces vectors, because my physics instructor said we should have already seen vectors which seem a lot like trig. but I've never heard it called that....haha random question because physics is starting to remind me of calculus.

[KarenisDestructive]

Yeah... Calculus is in physics, especially calculus 3

[patrickJMT]

sometimes vectors are taught in precalculus; they certainly show up in physics as karen pointed out.

ahahhahaha: saying physics is starting to remind you of calculus is like saying:

physics is starting to remind me of english (cause of all the words!)

[MATHGEEK1989]

Is this Linear Algebra? Thanks for the vid!

[patrickJMT]

sure, vectors certainly appear in linear algebra!

[AZBYCX22]

Awesome! This really helped

[stevewangster]

thanks! Your videos really help supplement what I am learning now.