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/sci/ - Science & Math

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965807 No.965807 [Reply] [Original]

Can you help me understand drawing vectors and planes in 3-space /sci/?

Im in calc III. I'm no artist.

>> No.965811

?!?
Drawing vectors in calc 3? What the ...

>> No.965814
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965814

Artists are small time OP, the real abstraction powers lie with mathematics

>> No.965819

>>965811
>>965811

???

is that not normal?

>> No.965826

>>965807
wtf is your question!

>> No.965827

what coordinate system ?

rct, polar, cyln?

>> No.965828

>>965819
I think I've never drawn a vector/plane in any math class, maybe one or two in linalg 1, but that's it; you're in calc 3, for what on earth do you need to draw vectors?

>> No.965831
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965831

>>965807
I pity the fool who cannot ask questions in a quantitative manner!

>> No.965837

>>965811

A problem I have is :

In exercise 57 and 58, the initial and terminal points of a vector v are given. (a) Sketch the directed line segment, (b) find the component form of the vector, (c) write the vector using standard unit vector notation, and (d) sketch the vector with its initial point at the origin.

57. initial point: (-1,2,3) terminal point (3,3,4)

idk I still find drawing it weird

>> No.965844

>>965837
Sounds like calc 3 to me.
(Implicit way of saying "fuck off next time ask honestly")

>> No.965851

>>965844

but then I would have gotten "no hw threads"

whatever, dont worry about it guys ill figure this out

>> No.965859

another problem is

identify and sketch the quadric surface.


19.x^2+y^2/4+z^2=1

>> No.965862

>>965851
On the other hand, I would have tried helping. Can't be worse than threads about religion, e^ipi and pronounciation of greek letters.

>> No.965864

>>965827


cyln and rect

>> No.965867

>>965859
sounds like a squished sphere
what's it called? an ellipsoid?

>> No.965878
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965878

>>965837
wtf? really? you cant do this? you can't draw a line in a 3D space? the kinda space you live in? are you retarded? you can't just figure this shit out? you have a book? notes? even without going to class, this is pretty self explanitory.

YOU NEED TO RECONSIDER YOUR MAJOR, BECAUSE ANYTHING INVOLVING MATH OBVIOUSLY ISN'T FOR YOU!

>> No.965882

>>965878

naw because I can do everything and anything quantitatively with relative ease.

The only thing that has ever "stumped" me in math is drawing it, and like I tried to make clear, this is because my drawing skills suck dick.

I can't draw stick figures. And my handwriting sucks.

>> No.965883

>>965867
yes, thats what its called

>> No.965893

>>965837
This is calculus 3? This is shit I did years ago. I've just finished calculus 1 at my uni, shit's way past this.

>> No.965895

>>965882
Ohh, ok then I apologize. I guess the "drawing" can be seperate from the "math". As long as you are good at the "math" I should all work out at the end.

You know your 2nd problem is an elliposide centered at (0,0,0). Take each coordite, set it to 0, and find the ellipse made by the other two coordiates. This will tell you the "streching" of the ellipsode.

>> No.965901

>initial point: (-1,2,3) terminal point (3,3,4)
3 - (-1) = 4i
3 - 2 = 1j
4 - 3 = 1k
Vector notation: (-1i + 2j + 3k) + t(4i + 1j + 1k)

>> No.965910

Can you correctly draw the 3 axis a point with specific coordinates first?