Parametric Equations 2

[isuruar23]

My teacher always weaves away from the lesson at hand and shows us useless boring presentations on statistics when we are supposed to do Edexcel C4 parametric equations!

[Skodmis]

You, my good sir, is awesome. !

[Jem93rocks]

Thank goodness for Khan.

[mellowmorgan92]

So... Calculus 3 is off to a REALLY bad start :/

[josef959]

P (2ap, ap^2)

[Avatar230594]

The night before your last high school math exam ever, so helpful, Thank you so much.

[DehXable]

Khan is your math teacher.

[djstrobe1234]

Couldn't you substitute the time in for X if you have the simpler version of the perimetric equations

[vishay23]

When he removes the third variable (t) does the equation become whats known as a Cartesian equation?

[MauricioVH92]

@vishay23 yeah

[barnamah]

You are awesome.

But

Please don't move the cursor so much. It is annoying to look at it moving randomly.

Thank you

[oscilox]

he uses what other math teachers don't. pretty colors

[bluewolfer]

Great guide, been slacking in class and this is really helpful!

[deathalert]

You are currently saving my good marks in Math 1010. This is my studying for my final :P

[Dgbug3]

It would be cool if he added explosions to the last drawing. (Just for laughs.)

[MasterThief1324]

Ok, now's lets account for the Einstein's law of relativity lol.

[osvideosdojoao]

Hi!

I learned to deduce a parametric equations through a line vectorial equation.

For example: (x,y)=A+k(a,b)

Where A is a point, k is a real number and (a,b) are the coordenaties of a given vector

[CyclopsMaker]

Can u make a little harder ones

cuz my school is gay like for example :

x(t) = t^2 -4

y(t) = t^3 -4t

and using derivatives and such plz plz D:

[ichbinhornig10]

i've been doing parametrics for about 6 months without actually knowing why we use them

now it makes sense :D

[mephatboi]

the sad truth is, most "teachers" either lack the insight/knowledge or r not considerate enough to explain ideas/concepts like sal does

[bf2gamestotal]

congrats man

[carolinagringa]

i wish you were my math teacher :(

[dapiridoob]

@carolinagringa khan is everyone's math teacher. Praise khan. all hail lord KHAAAAN

[menamedon92]

So, w/ the parametric equations, how could we find the direction the car is actually going w/ them? like, if the car was in reverse and it drives back, how could we discover that from the equation?

[ucrclxl]

@menamedon92

in this case x(t) indicates initial position of object (10) and direction (+) and speed (5) per unit of time (t). So if you basically change +5t into -5t the "car" starts moving backwards.

[hsktoadftw]

1 hour with sal= 1 whole year of physics

[ProdigiousAsian]

i love you for this

[mrbubblewand]

Thank you for this video. I ended up getting an awful instructor for this term and this video gave a much more meaningful and contextual explanation for parametric equations.

[TuscaniManiac]

nice !

[raidtothegrave]

program used?

[moomoofarm3]

omg, ur a genius, and this video should have like a million views!!!

[aubreydavid]

Sal. You're so thorough with this number thing, brah. You must be an engineer or something...Right?

[gobberpooper]

@aubreydavid I think he's an economist. He was on CNN explaining the credit crisis and has am MBA and such and such

[ureasonnable]

how can t= sqrt of 3? shouldn't it be instead sqrt of 10 which is rounded to 3.17 ?

[dwighthowardd]

He corrected himself like two seconds later.

[MustNotRead]

Sal is my personal Math mentor / guru who's (or is that "whose"?! argh!) videos i consult to make things clear. thank you Sal!

[peggyt201]

it's whose, who's means "who is" :)

[KruZer7]

thanks again

[thelastwords]

awesome