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Rotational motion (a) Show that [? ̂?,? ̂?] = ?ℏ? ̂?, [? ̂?,? ̂?] = ?ℏ?...

Rotational motion
(a) Show that [? ̂?,? ̂?] = ?ℏ? ̂?, [? ̂?,? ̂?] = ?ℏ? ̂?, [? ̂?,? ̂?] = ?ℏ? ̂?.
(b) Show that [? ̂2,? ̂?] = 0, and then, without further calculations, justify the remark that [? ̂2,? ̂?] = 0 for all ? = ?, ?, and ?. What does this mean in terms of uncertainty principles?

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