I love how Khan always gives you those "aha!" moments. ^_^
@IBeExtraCool
11 жыл бұрын
That 36.899 was messin with my ocd man. I felt like taking a Sharpie and writing on my screen that it's 36.8699 lol
@johannaandres6207
3 жыл бұрын
Watching this 10 yrs later :)
@tophatsheep3747
5 жыл бұрын
Hello mr Khan, you’re vídeos are amazing and incredibly helpful, the only bad thing I read the Spanish subtitles and at points in the video they stop showing. These videos are too good for me not to tell you this and would be cool from you to find the problem. That doesn’t take away that you’ve helped me and I appreciate it. Gracias 😁
@suprajhegde1405
8 жыл бұрын
really helpful.but notice that angle made by the triangle is 36.8699.but in further calculations it is written as 36.899
@sairuchir542
7 жыл бұрын
yea your right
@jimmynguyen9562
7 жыл бұрын
yea i noticed the same thing
@sairuchir542
7 жыл бұрын
Same, but its alright humans are not perfect. By making mistakes they learn, so same with this thing.
@yotamdubiner2545
2 жыл бұрын
omg bro thats crazy
@yotamdubiner2545
2 жыл бұрын
@@sairuchir542 no
@pinkrink
11 жыл бұрын
Think as vector quantities. He is moving up at a certain velocity (3m/s) and right at a certain velocity (4m/s). The distance is not 3+4, but the velocity is 3+4 because of the direction. Together, he is moving in the direction of ||a|| at 5m/s. It's hard to explain in text, but try to get your head around that :)
@dominicochoa9925
11 ай бұрын
Because 3^2+4^2=5^2 9+16=25. Pythagorean theorem. Hopefully this helps someone a bit
@namanrajsingh6139
6 жыл бұрын
I wish, you would have been my teacher, Sal... Telling this thing from the soul of my heart...
@mylove8951
5 жыл бұрын
Excellent Math travel! give me knowledge, and just like a poetry makes me happy and feel good. I need this and I love this course, thanks for my teacher.
@robertjohn2220
9 жыл бұрын
Wow, the graphics have come along way, great work In the diagram he uses 36.8699 and in the calculations it changes to 36.899
Oh my gods, THANK YOU!!!! What a lifesaver of a video!!!!
@ScorpiaX
13 жыл бұрын
What I did in a 75 minute class could be summarized in Khan's 8 minute lessons. Thank you for helping people like me to understand better ^^ or at least an essential integral lesson without taking too much time
@hanashah1
7 жыл бұрын
You are very good at explaining things..Thank you very much,you're a lifesaver 😁
@adityathadani7066
3 жыл бұрын
I wish time travel was possible
@adityathadani7066
3 жыл бұрын
Guys, Guess what!!!
@GuruprakashAcademy
8 жыл бұрын
Excellent. Very informative and to the point.
@irisakame
12 жыл бұрын
you saved my life!
@brendanmilton5025
9 жыл бұрын
Hi, great tutorial! where can I get the calculator from?
@Hino_55
4 жыл бұрын
Very clear explanation Sir Sal! Thankyou!!
@winterstellar
13 жыл бұрын
This is my favourite hobby! To visualize vectors in two dimensions! Or even three!: )
@antacidd3981
Жыл бұрын
I love u so much Mr. Khan, I use khan academy to study physics everyday in summer, thank u !
@youtubesam7591
7 жыл бұрын
So clear to eyes.
@tibg95
12 жыл бұрын
sine and cosine laws.
@muhammedshibin7008
3 жыл бұрын
Very helpful 👍
@glug307
Жыл бұрын
God loves you guys!
@ahmedkhalid1167
5 жыл бұрын
What is name the program that you use to make this video
@spacedoutmars
2 жыл бұрын
I’m a noob, how came vector a and b don’t equal c? Or does it?
@ibakedthecake
12 жыл бұрын
pythag is for right triangles only
@shayareedas8808
10 жыл бұрын
thnx.a must watch for every student.
@RidleyE
12 жыл бұрын
you are a fantastic human being.
@louisrodriguez2739
9 жыл бұрын
I think im color blind ! :P
@myleswebb1188
8 жыл бұрын
Game changer! Ty
@user-noursameh
5 жыл бұрын
A real life saver..thank you a lot!!!
@ForgottenBathory7
8 жыл бұрын
Can sin and cos formulas be applied in every problem involving two vectors?
@abdullahelnaggar7362
8 жыл бұрын
yeah :)
@ForgottenBathory7
8 жыл бұрын
Thanks.:)
@rymichael7203
7 жыл бұрын
if vector X = Xy+Xx then how the hell does 5=4+3. this is what I don't understand about vectors. how is the resultant equal to the sum when pyth teaches us that c=the square root of a^2+b^2. I can not reconcile the two together. this should be the first thing explained so there is understanding.
@noahgorman681
7 жыл бұрын
For adding vectors, the components are not mathematically added to equal the resultant. It's merely conceptual.
@plodazed61
10 жыл бұрын
How can you solve this without a calculator, say on the CSET Math Subset 1?
@midoriyanoutanch.8874
3 жыл бұрын
did you get the answer? I also have the same question please lemme know the answer too if you already know!
@Hyyacinth
2 жыл бұрын
@@midoriyanoutanch.8874 its been 7 years i dont think he will answer haha
@maycontainnuts3127
Жыл бұрын
i cant believe how poorly i was taught all this at school
@zkmalik
12 жыл бұрын
awesome explanation..
@zel_ni_kai_at_ken
10 жыл бұрын
thank you so much :D
@Phr3shBeatz
12 жыл бұрын
what do you do if its not a right angle triangle?
@imanonce8105
5 жыл бұрын
Thank you
@milan1397
2 жыл бұрын
i love how its explained like we're in kindergarten
@JustAnotherYoutubChn
12 жыл бұрын
@Phr3shBeatz dude it'll always make a right angle triangle
@barryhughes9764
7 жыл бұрын
Find the explanation of vectors confusing ! If any two vectors in R2 can be added anywhere in the plane then depending on their initial positions they can end up anywhere in the plane, is their final position in the plane irrelevant? If so why? Also I hear vectors described as being parallel and in the same direction......how can this be so? If two vectors are parallel then they cannot be in the same direction......they can have the " same orientation " but not the same direction. Example, if one vector points due North and another vector is parallel to this but offset say 500 miles then it is not in the same direction as the first. I only wish that definitions and illustrations of vectors was more rigorously approached and explained.
@bftb1000
7 жыл бұрын
Barry Hughes - It's a weird concept at first, but that's the case-- "direction" is referring only to the direction that the arrow end of the vector is pointing in, and it doesn't take into account its position in the coordinate plane. The direction of the vector is quantified with an angle (the angle the vector makes in relation to the positive x-axis). You can literally put the vectors anywhere on the plane and not change the vector itself, but it's handy to have them touching so you can see how they relate visually and use trig functions to find the component (horizontal and vertical) parts of the vector. So, vectors are a length (magnitude) and a direction (angle). Hope that helps!
@barryhughes9764
7 жыл бұрын
I appreciate the time you have taken to reply to my query. However it doesn't address the points I was making. I'm aware of the dot product , cross product, bi vectors etc. As I have said , and this is the pertinent point, vectors cannot be both parallel and in point in the same direction......they can however have the same "orientation".....so why leave the idea of " direction " open for interpretation? Also, one cannot say that the addition of say, two vectors in R2 or three vectors in R3 is independent of it's position. Surely the " force" or say the " acceleration" at one point would have a different effect on a system depending on " where " or it acts in the space of either of the above dimensions,........and these are the concepts I don't see being explained, specifically. Please, I intend no offence in this reply and am grateful for any clarification.
@damienwayne3755
6 жыл бұрын
I LOVE YOU!!! I finally get it!
@islulison
12 жыл бұрын
Thanks but you should help us with giving examples of word problems. This still helped alot though thank you very much.
@williamrobinson5859
4 жыл бұрын
Thx bud
@TU-qc5xr
3 жыл бұрын
sal i could listen to your voice forever lol
@sudarshanchauhan5900
11 жыл бұрын
Too gud I loved it
@sanjayshukla8666
5 жыл бұрын
Best vdo ever
@edsknife
7 жыл бұрын
All of the problems that we've been dealing with have stemmed from the fallibility of humanity.
@frutfly
3 жыл бұрын
you'e right my man
@MrShinobiguy
12 жыл бұрын
it's cool since, the main purpose was to get it as close as possible to the whole number
@2013dvan
12 жыл бұрын
plus all the time in linear algebra
@vijaynauhbar9424
6 жыл бұрын
a train moving with acceleration of 5 m/s^2 have 1 engine of mass 100 kg and 4 coaches of mass 50 kg each find the force exerted by 3rd coach on 4th
@wendycorbett70
6 жыл бұрын
Sal, you make things less complicated
@karishnaryan9926
10 жыл бұрын
*thanks alot*
@IndranujChatterjee-is-a-ninja
9 жыл бұрын
does he write all that with his mouse? i dont get how he does this
@worldsbiggestholdthegirlfan
8 жыл бұрын
+TheBinary There are tablets the connect to computers which have a stylus where people can write on those tablets and it can be transferred to notes. This is what my college professors use.
@AeroeGraphix
8 жыл бұрын
To add on he's probably in photoshop or something like it, and he just cut out the excess part of the screen so all we see is what he draws.
@eshanimhatre
7 жыл бұрын
why does his voice sound like he has a cold ?? i like the video BTW
@rizwana547
8 жыл бұрын
Plz Sir, try to explain basic things, for the sake of revision. Plz dont repeat the words more than 2 times. Thanks
@xoverlorderx
12 жыл бұрын
virtual scientific calculator...wow @.@
@mayko2468
6 жыл бұрын
David Tran yeah it used to be fascinating 6 yrs ago lol
@gregorybancroft5990
8 жыл бұрын
I think you might want to plan your videos more, so that it flows better. Also try not to repeat yourself when you right things down.
@gerimujo3650
5 жыл бұрын
thanks khan academy
@Phr3shBeatz
12 жыл бұрын
ahh kk. but do you know?
@Ethan.J.C
11 жыл бұрын
yea no one is perfect
@TheBhje
11 жыл бұрын
hahahahahha noticed the mistake
@vijaynauhbar9424
6 жыл бұрын
pls help me
@johnsmapreacher6525
2 жыл бұрын
Despite all the KZitem videos I've watched so far I still don't understand what a vector is. Eventhough I know how to deal with the math prob, I still can't picture a vector in real life. The knowledge my guy is taking too long to get here...
@BigBallaBarno
7 жыл бұрын
Anyone here from mr andersons class, if u are there is no hope for u.
@parthmaske3294
9 жыл бұрын
1tip:Change background to white to improve quality of vid.
@DogeFrom2014
9 жыл бұрын
***** I guess khan knows that most of us pull all-nighters ;)
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