So this is going to be minus one. That's the numerator over here. All of this stuff simplifies to negative one over, this is going to be cosine of negative pi over two. All right, this is negative pi over two. Cosine of negative pi over two, if you thought in degrees, that's gonna be negative 90 degrees. Well, cosine of that is just going to be zero. So what we end up with is equal to zero over zero.