Hankel determinants of certain subclasses of bi-univalent functions associated with hyperbolic sine function

In this article, we discuss the concepts of bi-starlike and bi-convex functions related to hyperbolic sine function $1+k\sinh z$ for $0 k \frac{1}{\sinh1}$. We determine the upper bound of generalized Fekete-Szeg\"{o} functional and second Hankel determinant of given bi-univalent classes.