[en] Inclusive angular distributions of protons and light ions in deep inelastic nuclear reactions are compared with different model predictions. A simple unified parametric description of all inclusive invariant cross sections studied is proposed. The variable X=P-T cos THETA, where P and T are impulse and kinetic energy of a secondary particle excaping from the nucleus at the THETA given angle is introduced. The X value enables with a good accuracy to give a common description of all experimental data in a wide range of varialbes