Try doing a fill down of x-values and then use a formula in another column to generate the values.
You should be able to then take the function values and plot them in Excel.
Plot the function Y = 20 tan (x – 20) over a 3600 interval. Ensure both your axis are clearly labelled and that the graph is appropriately sized and titled. Produce tables to generate all of the coordinates for both functions at 5o to 10 o intervals.
Could someone tell me how to plot this and how to plot in Microsoft excel