Caglar, MuratOrhan, HalitKamali, Muhammet2026-03-262026-03-2620220037-87122175-118810.5269/bspm.510242-s2.0-85124649345https://doi.org/10.5269/bspm.51024https://hdl.handle.net/20.500.14901/2046In this paper, we obtain initial coefficients vertical bar a(2)vertical bar and vertical bar a(3)vertical bar for a certain subclass by means of Chebyshev polynomials expansions of analytic functions in D. Also, we solve Fekete-Szego problem for functions in this subclass.eninfo:eu-repo/semantics/openAccessAnalytic and Univalent FunctionsSubordinationCoefficient BoundsChebyshev PolynomialFekete-Szego ProblemArticle