1. The problem statement, all variables and given/known data Calculate ΔSx and ΔSy for an eigenstate S^z for a spin-1/2 particle. Check to see if the uncertainty relation ΔSxΔSy ≥ ħ|<Sz>|/2 is satisfied. 2. Relevant equations 3. The attempt at a solution I'm confused on where to start. As I am with most of this quantum stuff. From what we've done earlier in the class... ΔS = √(<S2> - <S>2) and i believe that <Sx2> = ħ2/4 = <Sy2> = <Sz2> but i dont know where i'm supposed to go from there.