  Noether symmetries from geodetic Lagrangian for time-conformal plane
symmetric spacetime are presented. Here, time conformal factor is used to find
the approximate Noether symmetries. This is a generalization of the idea
discussed by I. Hussain and A. Noether symmetries from geodetic Lagrangian for
time-conformal plane symmetric spacetime are presented. Here, time conformal
factor is used to find the approximate Noether symmetries. This is a
generalization of the idea discussed by I. Hussain and A. Qadir [3,4], where
they obtained approximate Noether symmetries from Lagrangian for a particular
plane symmetric static spacetime. In the present article, the most general
plane symmetric static spacetime is considered and perturb it by introducing a
general time conformal factor $e^{\epsilon f(t)}$, where $\epsilon$ is very
small which causes the perturbation in the spacetime. Taking the perturbation
up to the first order, we find all Lagrangian for plane symmetric spactimes
from which approximate Noether symmetries exist. PACS 11.30.-j-Symmetries and
conservation laws PACS 04.20.-q-Classical general Relativity
