Yet again you conflate a problem with limit with a simplification problem.
trigsimp( sin(sin(z)^2+cos(z)^2) ); gives sin(1).
It is a difficult engineering question to figure out how much work to do on
simplifying input without special requests, like trigsimp. If you do too
much, commands can take too much time.
RJF
> -----Original Message-----
> From: maxima-bounces at math.utexas.edu
> [mailto:maxima-bounces at math.utexas.edu] On Behalf Of Vladimir
> Bondarenko
> Sent: Sunday, August 27, 2006 2:02 AM
> To: maxima at math.utexas.edu
> Subject: Maxima 5.9.3 bug in limit
>
> Hello,
>
> (%i1) limit(sin(sin(z)^2+cos(z)^2),z,inf);
>
> (%o1) ind
>
>
> Of course, the correct answer is sin(1).