Trigonometric Series

     Graph the following functions on your calculator, to see the effect when one adds trigonometric functions in orderly combinations.  Use at least 5 terms in each series - the more terms you use, the better the resulting graph looks.  (Make sure your calculator is in 'radian' mode.)

     For a good view of the graphs, use the screen windows given on the right. __________________________________________________________________________________

Triangle wave:

                  

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Square wave:

                                    

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Parabola: