Bug 1552789 and acos and simplification.



Raymond Toy wrote:
> Actually, it's looking for the pole of tan(x+1).  With the above
> change, it finds the pole is acos(0)-1.  However, it doesn't simplify
> acos(0) to %pi/2.  The actual expression is ((%acos simp) 0), so it's
> already simplified somehow.
> 
> How can I get maxima to convert that to %pi/2?
> 

I must have messed something up.  This is working now.  The integral is 
computed and it's still kind of wrong, but it doesn't hang.

A minor fix makes it work and I'll check in the change soon.  However 
there are other issues, but I'll file a new bug report on that.

Sorry for the noise,

Ray