  We exploit the standard techniques of the supervariable approach to derive
the nilpotent Becchi-Rouet-Stora-Tyutin (BRST) and anti-BRST symmetry
transformations for a toy model of the Hodge theory (i.e. a rigid rotor) and
provide the geometrical meaning and interpretation to them. Furthermore, we
also derive the nilpotent (anti-)co-BRST symmetry transformations for this
theory within the framework of the above supervariable approach. We capture the
(anti-)BRST and (anti-)co-BRST invariance of the Lagrangian of our present
theory within the framework of augmented supervariable formalism. We also
express the (anti-)BRST and (anti-)co-BRST charges in terms of the
supervariables (obtained after the application of the (dual-)horizontality
conditions and (anti-)BRST and (anti-)co-BRST invariant restrictions) to
provide the geometrical interpretations for their nilpotency and
anticommutativity properties. The application of the dual-horizontality
condition and ensuing proper (i.e. nilpotent and absolutely anticommuting)
fermionic (anti-)co-BRST symmetries are completely novel results in our present
investigation.
