When doing a line integral that involves units, what are the units for the dX term? is it the inverse of the units in the bounds?

11/15/2010 8:42:53 PM

thread delivers

[Edited on November 15, 2010 at 8:44 PM. Reason : .]

11/15/2010 8:44:23 PM

X, top minus bottom

11/15/2010 8:44:25 PM

dX has the same units as X

11/15/2010 8:45:31 PM

told u it was a stupid math question, lol. i'm second guessing the hell out of myself right now >.<

11/15/2010 8:45:46 PM

you should guess the derivative of the type of guessing you are doing to yourself right now

11/15/2010 8:46:36 PM

lol dweedle

11/15/2010 8:59:00 PM

Quote :

"stupid math question "

I got an A in calculus 3 but I will never forget the question that I asked that everyone in the class looked at me like I was the stupidest person in the world. Even after the class people came up to me and asked me wtf.

I still till this day have no idea why it was a stupid question, lol.

11/15/2010 9:41:37 PM

What was the question

11/15/2010 9:42:39 PM

Quote :

"What was the question"

11/15/2010 9:44:00 PM

the question, what was the question?

11/15/2010 9:45:24 PM

I don't remember the question, i just remember the response to the question.


We were doing 3-D volume problems and it was a question about how he worked his math on the board.

11/15/2010 9:45:31 PM

I hate when people get judgmental about not seeing an algebraic move or fucking one up

Like (a) who has the fucking time to verify everything a million times and (b) who thinks math skill is just writing shit down correctly every time

11/15/2010 9:46:39 PM

To be fair, nobody can see inside your head, McDanger. Therefore, you have to write what's inside your head on paper so the teacher can accurately determine whether you know what you're doing or whether you're guessing and getting lucky.

11/15/2010 9:48:16 PM

Quote :

"I will never forget the question"

Quote :

"I don't remember the question"

11/15/2010 9:53:03 PM

^I, too, was wondering this.

11/15/2010 9:54:15 PM

This question is questionable.

11/15/2010 9:55:19 PM

11/15/2010 10:27:25 PM

Quote :

"I don't remember the question, i just remember the response to the question."

Well, what was the response?

11/15/2010 10:28:18 PM

i dont remember the response, i just remember how i felt afterwards


im reading all this recollection of the past w/ the wonder years voice saying it in my head

11/15/2010 10:29:44 PM

Quote :

"To be fair, nobody can see inside your head, McDanger. Therefore, you have to write what's inside your head on paper so the teacher can accurately determine whether you know what you're doing or whether you're guessing and getting lucky."

Yeah but sometimes you drop a sign and that doesn't make you a dummy

11/15/2010 10:30:51 PM

Always remember "+ C".

11/16/2010 1:33:49 AM

Quote :

"Yeah but sometimes you drop a sign and that doesn't make you a dummy"

Whether you know what you're doing or not, a missed unit will result in the wrong answer. Whether you're working in construction or rocket science, a simple sign drop can mean major catastrophe.
Sometimes you forget to covert units from standard to metric and you kill astronauts.

11/16/2010 1:34:02 AM

heres a tricky question

x radians or degrees

is integral sin(x) the same for both?

11/16/2010 3:41:56 AM

no

now it's known that the antiderivative of sin(x) with respect to x is -cos(x), if x is in radians

if x is in degrees, then the equivalent in radians is x*pi/180 so if Sin(x) and Cos(x) are the sin and cos functions "where x is in degrees" then Sin(x)=sin(x*pi/180), so the antiderivative of Sin(x) with respect to x is 180/pi*-cos(x*pi/180), which is -180/pi*Cos(x)

11/16/2010 4:17:26 AM

Quote :

"major catastrophe"

11/16/2010 7:29:42 AM

i solved for dx and got this

11/16/2010 9:07:01 AM