Coefficient Estimates for Two New Subclass of Bi-Univalent Functions Defined by Cosine and Logarithmic Functions. Coefficient Estimates for two new Subclass. JPEHSS [Internet]. 2025 Sep. 24 [cited 2026 May 6];3(3):80-96. Available from: https://journal-of-social-education.org/index.php/Jorunal/article/view/684