Here is a program I have written to quickly produce sine or cosine graphs.  You can vary any of the parameters, or switch between sine and cosine.  Click on the link below to download this program.

Problem for people who like maths:  How many solutions are there to this equation?

                                     root 2, to the power x  =  x

Please email me (click on my photo above) with any mathematical problems or peculiarities of your own.