Answer Happy

2. (30 points) Determine which of the following one-dimensional wave functions represent states of definite momentum. For each wave that does correspond to a state of definite momentum, determine the momentum (a) y(x) = e-kx (b) y(x)=x²e-kx (c) y(x) = sin(kx) + i cos(kx) (d) y(x) = ex+e -ikx