Parametric analysis of Cherenkov light LDF from EAS in the range 30 -10000 TeV for primary gamma rays and nuclei, ways of practical application A.Sh.M.Elshoukrofy, E.B. Postnikov, E.E. Korosteleva, L.G. Sveshnikova, H.A. Motaweh A 'knee-like' approximation of Cherenkov light LDF from EAS is capable of solving numerous tasks of the gamma-observatory TAIGA. In particular, it allows shower core determination, separation gamma from hadrons and light nuclei from heavy ones, energy estimation. Up to present various approximations were made for the energy whether greater than 1000 TeV (non imaging technique), or up to 10 TeV for the imaging telescopes. We carried on our investigation on a CORSIKA-simulated data of LDF using a space step of 5 m in the range 0-50 degrees for primary gamma, protons, and nuclei. We found that for the distance from 20 m to 500 m a knee-like approximation fits particular LDF as well as averaged LDF with a very good accuracy for each zenith angle and type of particle. Typical values of fit parameters were determined for various type of primary, zenith angle, and energy. A simplified approximation was developed for determination of shower core on the base of very limited number of hit detectors. We revealed sensibility of fit parameters to the EAS maximum depth as well as to the type of the EAS primary, and Q factor estimation is performed for the task of the hadron background suppression.