Magnitude and Direction of a Vector, Example 3

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  1. patrickJMT
  2. math
  3. vector
  4. angle
  5. magnitude
  6. length
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Комментарии
Автор

It should be arctan(-10/3) = -73.3 degrees. And then in order to find the direction angle, simply add 360 degrees + (-73.3 degrees). Your positive direction angle should be 286.7 degrees.

midas
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Patrick, do you have a video on finding the direction of a 3 dimensional vector? I am having trouble finding the "direction" of a vector "4i +3j +5k". Please respond! :)

inkster
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Please more examples of the direction angle :))

DrunkieUnicorn
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How did we know it was 270 degrees we needed to add to?

dotthurman
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THANK YOU SO MUCH! If only more physics teachers were like you!

Evelyn-vhex
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isn't it tan(y/x) so it should be 10/3?

DeuceisLegit
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Both ways of doing it is right 10/3 or 3/10. Only the substraction changes. I got 73 degrees, direction will be 360 degrees - 73.

PriyankaByahatti
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🅱ector 🅱ommiting 🅱rimes 🅱ith 🅱irection 🅱nd 🅱agnitude

swawssfm
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Problem #2 is, Tanθ= b/c which is -10/3 just want to correct that part .

hanf
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Great video. So you only subtract when it is on 2nd, 3rd and 4th quadrant?

renan
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Wait the direction or bearing be 19. 43 cuz its degrees from the y axis...?

samanferrari
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The component form of the vector [2, 6] (also [run, rise]) will always give you the opposite and adjacent sides of the triangle, with theta being the center of the vector. The magnitude is the hypotenuse. You can use sin or cos, but when you have the component form, its just simpler to use tan. Watch patrickJMT's video "an introduction to vectors" for a better understanding on which angles are relevant.

AdrielGreene
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you cant use the greater then less then bracket on youtube comments... so I used [ ] instead : (

AdrielGreene
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Do you have a video where you show how to find the angle without a calculator. My professor does not allow calculators :-(

senorstrangelov
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I really like the fact that you choose to show examples for different types of coordinates. Great Video :)

aznloleepop
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ahhhh....
CALCULATOR!!
calculator works!!!
joke nice vid men :)

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