Substitue Symbolic Derivative Term

I defined symbolic variables and function and took its derivative:

syms t x(t) xdot

A=sin(x);

diff(A,t)

This generated - D(x)(t)*cos(x(t))

Next I tried using the subs command to replace 'D(x)(t)' with xdot but didnt have any success. Does anyone know how to conduct this substitution? What is exact syntax?

Thanks!

Rajmohan

[Walter Roberson]

What shows up if you use

evalin(symengine, 'PRETTYPRINT := FALSE');
feval(symengine, 'print', 'NoNL', diff(A,t))