The secant method is a root-finding algorithm that uses a succession of roots of secant lines to better approximate a root of a function f. A brief secant method description can be found below the calculator

The false position method is a root-finding algorithm that uses a succession of roots of secant lines combined with the bisection method to approximate a root of a function f.

The bisection method in mathematics is a root-finding method that repeatedly bisects an interval and then selects a subinterval in which a root must lie for further processing. The method is also called the interval halving method.

This online calculator implements Newton's method (also known as the Newton–Raphson method) for finding the roots (or zeroes) of a real-valued function.

This online calculator calculates index of coincidence (IC, IOC) for the given text