I need to calculate derivative of a function whose parameters are functions of other parameters using MATLAB or Maple

Question

I'm doing some mathematical calculation of some symbolic math that includes multiplication and differentiation of some matrices.
Some of the parameters in my calculations are functions of time. for example I have sin(p) where p is a function of time and when differentiating, it should be like p(dot)*cos(p). There are very big matrices that have large expressions like this and I should differentiate them.
The problem is that I can't perform this in MATLAB (symbolic math toolbox) or Maple.

Answer 1

So the problem is that MATLAB doesn't know p is a function, and assumes it to be a constant? Could you replace all p with p(t), or something like that. (I'm unfamiliar with MATLAB, so I'm not sure the best way to explicitly define p as a function of t.)