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There are 6 NRICH Mathematical resources connected to Maclaurin series, you may find related items under Calculus.Broad Topics > Calculus > Maclaurin series
Look at the advanced way of viewing sin and cos through their power series.
Can you deduce the familiar properties of the sine and cosine functions starting from these three different mathematical representations?
Get further into power series using the fascinating Bessel's equation.
Build up the concept of the Taylor series
Looking at small values of functions. Motivating the existence of the Taylor expansion.
Build series for the sine and cosine functions by adding one term at a time, alternately making the approximation too big then too small but getting ever closer.