Topic: plot/model the inputs and output of the signal

I have sine 40 sin and 30 cos how do I input into graph

Re: plot/model the inputs and output of the signal

You may have to provide more information. It is unclear what it is you want. But if you want to plot the function f(x)=40*sin(x), select $matches[1] in the menu and enter the equation as $matches[1] in the dialog. You may need to zoom out or adjust the axes range to see the function.