The following is a table
complete the table (I'm wondering if I could just 
use a like trig circle the kind with the degree 
and radians and its equivalant in sine an cosine)

     sin   cos   tan   sec   csc   cot
0° |     |     |     |     |     |     |



Here is the best way to think of 0°. Pretend that 0° 
is a very small angle, like this:  



Yes we know that 0° is really closed all the way down to
the right side of the x-axis, but let's pretend it isn't 
closed all the way, and that it is like the above.  Now 
let's label x=1, y=0, and r=1, like this:



Now we just remember that

sin@ = 
cos@ = 
tan@ = 
sec@ = 
csc@ = 
cot@ = 

     sin   cos   tan   sec   csc   cot
0° |  0  |  1  |  0  |  1  |undef|undef|

Edwin