“Trigonametrik funkciyalardıń anıqlamalarınan paydalanıp berilgen teńliklerdi esaplaw hám dálillew” (2024) Modern education and development, 5(1), pp. 194–199. Available at: https://modernedu-dv.com/index.php/dv/article/view/38 (Accessed: 6 November 2024).