# math 285, the week of August 25

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

Homework (due by Monday, 9.1):

1. For which $$x$$ there exists a real solution to
$y^2-4xy+4=0?$
2. Simplify
$\frac{\sin(x+y)-\sin(x-y)}{\sin(y)}.$
3. Solve differential equations
$y’=\sin(2x+3)$
and
4. $y’=\frac{1}{1+t^2}$