trigreducee()??



I'm a MAXIMA beginner and I'like to know 

- if is possible to apply the trigreduce to a matrix to trig reduce every 
  term of the matrix and,
- How can I get a full trigreduce of a expression A, something to do :
  trigreduce(trigreduce(trigreduce(A))), in a direct way.

Thanks,
yours,
alexandre campos