  We study the relative error of the state-dependent N=>L cloning. A copying
transformation and dimension of state space are not specified. Only the
unitarity of quantum mechanical transformations is used. The proposed approach
is based on the notion of the angle between two states. Firstly, the notion of
the angle between two states is discussed. The lower bound on the relative
error of copying with multiple copies is examined. In addition, the lower bound
on the absolute error is then studied. We compare the obtained bounds with the
case of maximizing the global fidelity.
