👉 The term "arctangent" refers to an angle whose tangent value is equal to a given angle. Specifically, it represents the ratio of the sine of that angle to its cosine. In trigonometry, the arctangent function (or arctan) is defined as: \[ \tan^{-1}(\text{a}) = \arctan(a) \] Where \( a \) is the angle whose tangent value we are trying to find. This function returns an angle
