Show that the orbits of this action of H on G are the same as the cosets of H. This shows that the two potentially different meanings of G/H (one is the set of cosets, the other...Show that the orbits of this action of H on G are the same as the cosets of H. This shows that the two potentially different meanings of G/H (one is the set of cosets, the other is the set of orbits of the action of H on G via R), are in fact in agreement.