Polar equation plotter

Topic:
Equations
• Write the polar equation in terms of in the box. Use t to represent θ.
• Use the functions sin(), cos(), tan(), ln(), exp(), abs().
• Move the slider to adjust the value of radians and trace the curve.
• Switch on the ray to see how the curve changes with r and θ.
• Use the buttons along the top to move or zoom the display.
When I figure out how to write a script to replace the t with a in a dynamic text box containing the equation...then I'll update this.