Vectors - Finding Magnitude or Length

Vectors - Finding Magnitude or Length. I give the formula, and do a couple examples of finding the magitude, or length, or a vector. Nothing heavy!
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Category:

Education

Tags:

• math
• calculus
• vector
• magnitude
• length
• dot
• product
• cross
• example
• justmathtutoring.com
• help

[FirstGradeCalculus]

You're a great teacher!!!

[patrickJMT]

@FirstGradeCalculus thank ya ; )

[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.

[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.

[chiffon903]

Thanks this does help a lot!

Internet is just amazing isn't it

[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