While playing around, I noticed that maxima doesn't know the value of
cot(%pi/8). This can obviously be derived using the half-angle formula
from cot(%pi/4), which maxima knows.
I noticed that ntrig1 handled multiples of %pi/10 but nothing else. So
I updated it to handle multiples of %pi/2^n, %pi/3/2^n, and %pi/5/2^n.
I was debating on whether to just post the code somewhere or updating
ntrig1. Any objections to updating ntrig1?
Ray