Online calculator: Numerical integration
https://planetcalc.com/5494Numerical integration is used in case of impossibility to evaluate antiderivative analytically and then calculate definite integral using Newton–Leibniz axiom. Numerical integration of a single argument function can be represented as the area (or quadrature ) calculation of a curvilinear trapezoid bounded by the graph of a given function, the x-axis, and vertical lines bounding given …
Numerical analysis - Wikipedia
https://en.wikipedia.org/wiki/Numerical_analysisThe study of errors forms an important part of numerical analysis. There are several ways in which error can be introduced in the solution of the problem. Round-off errors arise because it is impossible to represent all real numbers exactly on a machine with finite memory (which is what all practical digital computers are). Truncation errorsare committed when an iterative method is terminated or a mathematical proc…