This applet allows you to experiment with partial sums for a sine series. [br][br][math]f\left(x\right)\approx\sum_{n=1}^NB_nsin\left(\frac{n\pi x}{L}\right)[/math][br][br]The things to change include[br]N : The number of terms in the series. The play button at the bottom will increase the number of terms.[br]L : the length of the domain.[br]B[sub]n[/sub] : The coefficients for the series as a function of 'n'[br]f(x) : The function of [math]x[/math] on the domain [math]0 you are trying to approximate.