In this problem you will derive the commutator
a. The angular momentum vector in three dimensions has the form l = i lx + j ly + klz where the unit vectors in the x, y, and z directions are denoted by i, j, and k . Determine lx, ly, and lz by expanding the 3 × 3 cross product l = r × p. The vectors r and p are given by r = ix + j y + kz and p = ipx + jpy +kpz.
b. Substitute the operators for position and momentum in your expressions for lx and ly. Always write the position operator to the left of the momentum operator in a simple product of the two.
c. Show that
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