How to use

Enter a function f1() in the text input field marked "r=f1(t)=".
(Type "t" for .)

 Example: f1(t)=1-sin t

Click the "Graph" button (this button also refreshes the graph).

To see two functions graphed simultaneously:

Enter the second function f2() in the text input field marked "r=f2(t)=".

Click (to its "on" state) the check box next to this input field.

Click the "Graph" button.

 Example: f1(t)=1-sin t, f2(t)=cos  2t

Up to 5 functions can be graphed simultaneously.

To remove a function from the graph, click (to its "off" state) the check box next to the associated text input fields and click the "Graph" button to refresh.

To erase the graph and all input fields, click the "Clear" button.

 Circles: f1(t)=1, f2(t)=sin t, f3(t)=cos t

 "Rose" curves: f1(t)=cos 2t, f2(t)=sin 5t

 Cardioid: f1(t)=1-sin t

 Limaçon: f1(t)=1-2sin t

Other Notes
The graphs of the functions are color-coded, corresponding to the colors of the labels marking the text input fields: the graph of f1() is blue, f2() is red, f3() is green, f4() is orange, and f5() is magenta.