👉 Cossid is a type of mathematical expression used in statistics, specifically in the context of regression analysis. It is often denoted as "cos(x)" or "coss" for short. This symbol represents the cosine function with an argument x that ranges from -1 to 1 (where 0 corresponds to zero). The cosine function is a measure of the vertical angle between two vectors, and it can be used in various applications such as regression analysis, which involves analyzing data to understand relationships