Maxima solve function find no solution

Question

I am new to Maxima.

If I do:

solve([x = 2, y = 3], [x, y]);

I get:

 [[x = 2, y = 3]]

Which is correct !

If I do:

solve([sin(x) = 1], [x]);

I get:

         %pi
      [x = ---]
          2

Which is also correct !

But if I do:

solve([sin(x) = 1, y = 3], [x, y]);

I get:

[]

Why ?

Thanks for your help.

user_3170376 · Answer

After load(to_poly_solve); try

to_poly_solve([sin(x)= 1, y = 3], [x,y]);