symbolic derivative with respect to time

hello everybody

Im trying to take derivative from an equation and i need to have symbolic derivative of my terms with respect to time for example I want to write :

sin(x)

and get

I`ve already tried functinal derivative and diff commends, maybe I didn`t used them in correct way but they didn`t work that way. anyway please let me know if there is a way to do this kind of derivative in matlab.

Answer 1

[KSSV]

syms x(t)
f = sin(x(t))
diff(f,t)