Arctan refers to the arctangent function, which is an inverse trigonometric function, that is, the inverse function of the tangent function. Higher mathematics in general universities is involved.

brief introduction

The inverse function of the tangent function y=tanx in the open interval (x∈(-π/2, π/2)) is denoted as y=arctanx or y=tan- 1x, which is called the arc tangent function.

It represents the only fixed angle on (-π/2, π/2) whose tangent value is equal to x, that is, tan(arctan x)=x, and the domain of the arctangent function is r, that is, (-∞, +∞). The arctangent function is an inverse trigonometric function.