JOURNAL OF MATHEMATICS AND COMPUTER SCIENCE, cilt.25, sa.1, ss.29-36, 2022 (ESCI)
In this article we define a class of starlike functions with respect to symmetric points in the domain of sine function. Also, we investigate coefficients bounds and upper bounds for the third order Hankel determinant for this defined class. We also evaluate the Zalcman functiona vertical bar a2/3 - a(5)vertical bar. Specializing the parameters, we improve Zalcman functional for the class of starlike functions.