How to quad("sin(a*sin(x))*sin(x)",0,pi/2)?

[niles]

Now I know this won't work as written but I'd like to do something like:

quad("sin(a*sin(x))*sin(x)",0,pi/2)

and loop over various values of "a".  How can I do this?

If I could "define" a function from the command line I could keep
changing the definition in a loop.  Is this possiable?

Perhaps a could do some fancy "printf" to a file that defines the function,
but this seems way convoluted.

Anyone have any better ideas?

        Thanks,
        Rick Niles.