Cosines are often used in mathematics and trigonometry to represent angles and their relationship to the sides of right triangles. There are several synonyms for cosines that can be used interchangeably. Some common synonyms include cosine function, cos, and cosinus. Additionally, cosine can also be referred to as the adjacent over hypotenuse in a right triangle. Other similar terms include secant, which represents the reciprocal of the cosine, and tangent, which represents the ratio of the opposite side over the adjacent side. Understanding these synonyms and their relationships can be crucial when working with trigonometric functions in mathematical or scientific applications.