• Enter values for constants a, b and d (numeric and decimal)
• Enter fractions of pi for c (e.g. pi/2)
• Choose a trig function from the dropdown list
• Click the graph it button to display the graph
• Click the grid button to turn grid display on and off
• Move the sliders at the bottom to scale the graph in either direction
• Click the clear button to start again and redraw grid or scales
  

Click here for graph