1. The problem statement, all variables and given/known data One of the problems in our test is this. Express the eigenvectors of [itex] J_y [/itex] in terms of the eigenkets of [itex] J^2 [/itex] and [itex] J_z [/itex] . 2. Relevant equations 3. The attempt at a solution I know the matrix of [itex] J_y [/itex] and the operators or eigenkets for [itex] J_y [/itex] ,[itex] J^2 [/itex] and [itex] J_z [/itex]. I just don't seem to understand the question. Can someone please explain it to me please? What should I do?