I am struggling with question about possible outcomes of momentum measurement and their probability. I know I can calculate it with momentum operator, but a wavefunction is of form
ψ(x)=3cosπx+cos3πx
and I am unsure how to deal with it, as the derivative consists of sines.
I know that coskx=eikx+e−ikx2 and px=ℏk, but does it mean that the momentum is sum of eigenvalues of individual exponentials?
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