[pstricks] Outputting a particular value of a function using PSTricks

[dpstory at uakron.edu]

Hi all,

Is there a way of computing a particular value of a function, say sin(20), using PSTricks?

I wish to typset a sentence like:

y-coordinate:  sin(20)

This is part of a multido that is reading out the x and y coordinates in an animation we are 
trying to build.

Any ideas?

Many thanks

dps