Brash up your calculus. Review Chapter 1.1. Listen to the first lecture.

*Homework* (due by **Monday, 9.1**):

- For which \(x\) there exists a real solution to

\[

y^2-4xy+4=0?

\] - Simplify

\[

\frac{\sin(x+y)-\sin(x-y)}{\sin(y)}.

\] - Solve differential equations

\[

y’=\sin(2x+3)

\]

and - \[

y’=\frac{1}{1+t^2}

\]

I cannot listen to the lecture no matter how much I try. I log in correctly, however I allways get the following response. http://bit.ly/Z3vpFJ

Do you have an account on uofi.box.com? If not, do register; it will give you, besides the access to the lectures, 15Gb of cloud storage.

I was also having the same problems and I would get the same response as Abrar. So instead of signing in with our UIUC ID and password, we should make a separate account for uofi.box.com to listen to the lectures?

I think you need to sign up for uofi.box.com, using your UID.

Try this: Click the login button below and use the @Illinois.edu email to login. Use “forgot my password” to change the password if necessary.