A function that implements an approximation solution for a problem. In general, the function approximation problem asks us to select a function among a well-defined class that closely matches ("approximates") a target function in a task-specific way
In computer science, they are many times that we can not compute something with full accuracy, because it's infinite. For example, in order to compute the value of cosine(π), we perform some approximation.
The function that would perform the computation of cosine(π) approximately is a function that uses approximation.
This tag should be used for problems that have to do with functions that implement an approximation solution for a problem.
Sometimes, these functions receive an ε parameter, which controls the approximation. Usually, ε, is called an approximation factor.
