Here's a rough idea of what I think is important for the first midterm.  
You can also keep an eye out for a practice midterm, which will probably 
be posted on Monday.

- Angles.  Positive and negative angles.  Conversion between radians and 
degrees.

- Definitions of trig functions.  Given a point (x,y) on a circle of
radius r which corresponds to an angle t, you should be able to give me
the value of the trig functions.  [For example, sin(t)=y/r.]  In class we 
usually used a circle of radius r=1, which made the definitions easier, 
but you may or may not run across a circle with a different radius on the 
test.

- Exact values of the trig functions.  You should be able to give me exact 
values (no decimals) of the trig functions for all of our "nice" angles: 
multiples of 30 degrees and multiples of 45 degrees.  You can find all of 
these by drawing a 30-60-90 or 45-45-90 triangle within a cirlce and using 
the definitions.

- properties of the trig functions: even/odd, domain/range, min/max, where 
the zeros are, etc.

- Graphs of the trig functions.  You should be able to work with the 
"general" equations such as y=A*sin(wx) or y=A*sin(wx-p).  Same for 
cosine.  You should be able to graph tan(x) and apply some basic 
transformations to it.  Given a graph of (for example) cot(x) you should 
be able to graph something like 2*cot(x-1).

- basic trig identities, such as those in section 5.4.

- Inverse sine and cosine functions.  (We'll continue talking about these 
on Monday)

More details this week in class --

Jon