Geometric Construction of Inverse Cosine Function

This example visually demonstrates the geometric definition of the inverse cosine function within an isosceles triangle context. Core mathematical concepts involve trigonometric inverse functions, vector operations, and planar symmetry. The construction primarily utilizes the Mirror command in GeoGebra to build symmetric structures, accompanied by text labels for angles and side lengths. This resource is suitable for high school mathematics instruction, assisting students in understanding the geometric background of arccosine values and vector angle calculations.