In the process of solving trigonometric equations, when we make some changes of forms or when the left side is replaced by the right side of the formulas given in the article, the solution may disappear. This is why it is important to check the roots that we find when using these formulas.
International Journal on Integrated Education (IJIE) 2620-3502 is a peer-reviewed, open-access scholarly journal, publishing high-quality manuscripts in multidisciplinary research areas. IJIE accepts papers in the forms of original research articles, review articles, book reviews, case reports, and ...