simplify the expression sin(x-y)+sin(y-x).

sin(x-y)+sin(y-x) can be simplified by using the fact that sine is an odd function.

Since sin(-θ) = -sin(θ), we can rewrite sin(y-x) as -sin(x-y).

Therefore, the expression simplifies to:

sin(x-y) + (-sin(x-y))

And combining like terms, we get:

sin(x-y) - sin(x-y)

Since the two terms cancel each other out, the simplified expression is:

0