Re: Free software
I would start in a colum a enter 1 in the 1st row, 2 in the second, and 3 in the third. Then highlight a lot of cells in a colum and select "Edit" and "Fill" and "Series". Excel will enter 4,5,6 and so on.
Then in the next column, enter "=sin(" and then select the cell with the "1".
Select teh cell with the sine function, and select copy. Hightlight all the cells under it and enter paste.
Now you have a lot of points you can chart.
Steve