You can use the arctan to determine an angle measure when the side opposite and the side adjacent to the angle are known. The arctan has practical applications in architecture, building, landscaping, physics, and engineering, among other scientific and mathematical areas.

What is the arctan rule?

Arctan definition

The arctangent of x is defined as the inverse tangent function of x when x is real (x∈ℝ). When the tangent of y is equal to x: tan y = x. Then the arctangent of x is equal to the inverse tangent function of x, which is equal to y: arctan x= tan^-1 x = y.

Is inverse tan same as arctan?

The inverse of tangent is denoted as Arctangent or on a calculator it will appear as atan or tan^-1. ... Sine, cosine, secant, tangent, cosecant and cotangent are all functions however, the inverses are only a function when given a restricted domain.