function graphing

[Corruptissima]

One way to graph equations in CAS home is to use plotfunc command.

For your sample equation (a*tan(x+a))+(a-sin(a*x)),
you can type in plotfunc((a*tan(x+a))+(a-sin(a*x))|a=-1) etc. It will show a small graph in CAS home. if you select the graph and then touch the Show soft menu then a full-screen graph will be shown.
You can double tap on plotfunc((a*tan(x+a))+(a-sin(a*x))|a=-1) to copy on to the command line then press esc key and then modify just the a= to another value and plot another graph.
Altenatively, use this simple program called pfn.
       
[code]
#cas
// Using plotfunc command to plot a function
// in CAS home
pfn(a):=
BEGIN
plotfunc((a*tan(x+a))+(a-sin(a*x)))
END;
#end

Using above program you can simply type pfn(-1) etc