Нурбаева, Д. ., Ж. . Нурмухамедова, С. . Ералиев, and Б. . Косанов. “ABOUT DEVELOPMENT OF STUDENTS ’ THINKING WHEN SOLVING TRIGONOMETRIC EQUATIONS AND INEQUALITIES IN THE SCHOOL ALGEBRA COURSE”. Bulletin of Abai KazNPU. Series of Physical and Mathematical Sciences, vol. 69, no. 1, June 2021, pp. 138-43, https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/225.