I know that the unit circle is soooo Pre-calculus, but it's causing me problems in my calculus class. There'll be questions that expect you to know the coordinates at a certain radian and what not. Are there and tips, tricks, etc, that you all can give me in remembering/learning the unit circle? I mainly need help with sectioning it different ways ( Read more... )

Hey. I'm working with these two guys: y''-x^2*y=0 and (1-x^2)y''+x*y'-y=0

for the first i wound up with these results:

a2=0 and a3=0

The reccurence relation looks like this.

an-2=an+2*(n+2)(n+1) n>2

after carrying out a few terms i can't find any particular pattern that's involved.

a0=4*3*a4///space//// a1=5*4*a1
a2=a66*5=0///space ( Read more... )

I have a quick limit question:

limit (x,y -> 0,0) [cosx - 1 - x^2/2][/x^4 +y^4]

I can't figure out if there's a way to make it definable...is it possible?

Hi =) My summer assignment for AP Calc. AB is due this weekend, and so my friend and I were going over our answers and we ran into a few problems we did not agree on ( Read more... )

I went on vacation, and when I came home today I found out I have to take a math placement test by tomorrow at 8 AM. But, I don't have my trusty TI83! and I might not be able to borrow one. I know they exist, and I spent about an hour looking for one, but if anyone knows of a good online/ downloadable TI emulator I would REALLY appreciate you

( Read more... )

I don't know how (well, sheer effort, I suppose), but I passed Calc I. Thank you to everyone here who took time to help me. I didn't want to just be told the answer, I was interested in learning what steps were involved and what approach I should be taking for future test questions ( Read more... )

Prove.

lim x--> 0 x^2cos(1/x^2)=0

so the lim x-->0 x^2 = 0 and anything multiplied by zero is zero. is that it? b/c the cos lim is undefined @ 0 and oscillates b/w a neg and pos when x-values approach 0 from either side. is there a squeeze thm opportunity i'm missing? i don't get it :(

ps i'm studying for the final on thurs...hopefully i

So the problem is easy to understand, I think (I know what I'm supposed to find, I see what I'm being asked to do), but I have no idea of how to go about approaching this stuff. ( Read more... )

I'm transferring to a new school for the fall term to purse a BS in mathematics. Last year was my first year back in school after a decade-long absence, so I knocked off some Calc I rust. To make a long story short, the sections of Calc II offered in the fall may be filled up by the time I'm allowed to register, but they are offering it in the ( Read more... )