This work provides a differential equation in modern school textbooks, the solution of which is a
trigonometric function, and shows a method for determining it in the form of degrees. These elementary solutions are
represented in the form of ranks. Consequently, a student has the ability to get acquainted with the application of
trigonometric functions with the help of multiplexes. There is also a way to find the solution of the differential equation
by computer in MatLab environment.

1. Колмогоров А.Н. и др. Алгебра и начала анализа, 10-11 класс/ А.Н. Колмогоров и др. – Алматы: Рауан, 1992, -352 с.
2. Эльсгольц А.Э. Дифференциальные уравнения и вариационное исчисление/ - М.: Наука, 1965, -424 с.
3. https://uniface.kz/index.php