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## Homework Statement

Determine the matrix representation of the rotation operator

[itex] R(\phi k) [/itex] using the states |+z> and |-z> as a basis. Using your matrix representation verify that [itex] R^{\dagger}R=1 [/itex]

## The Attempt at a Solution

Do I need to write [itex] R| \psi> [/itex] in terms of a matrix.

If I have [itex] |\psi>=a|+z>+b|-z> [/itex]

Then do I just operate R on [itex] \psi [/itex] and then write this in terms of a matrix.

are these related to the Pauli spin matrices