The Taylor, Maclaurin series is useful because it gives a framework for approximating functions. Here are some examples of the Taylor series.

In engineering it is useful to create a mathematical model that can approximate real-world phenomena. Examples include the

1) Navier-Stokes equations that model fluid flow in video games, science and engineering.

2) The Black-Scholes equations which model when to bet on the stock market, orbital mechanics models that allow for spacecraft to reach other planets that are billions of kilometers away with accuracy. All of these models are created with Partial DE, and all of them are so complex that they cannot be solved with a pencil and paper. They require numerical methods and analysis in order to approximate the solution These numerical methods are derived using Taylor series to approximate derivatives.

3)Calculators – Ever wonder how a calculator can figure out sin x, cos x, or a multitude of other functions so quickly? Using a Maclaurin series, many normal functions can be represented as straight forward sums. Calculators are really good at sums, so in order to make a calculator quickly find sin(x) with 12 decimal point accuracy, the Taylor series expansion of sin x centered at zero is used.