Equation Tool
Use the Equation tool in Sketcher to create curves based on mathematical
equations.
You can select from a number of preset equations or write custom equations in Sketcher.
The image below shows a Sine Wave equation.

The equation is constructed in the Options panel. The image below shows the equation for the Sine Wave shown above.

You can enter an equation in the input fields for X and Y. Z is for 3D equations. You can enter a value to offset the curve in the Z-direction.
Clicking the icon to the right of the X, Y, or Z input fields opens an editor for more complex equations.
Use the Equation tool
in the Design tab to
create 3D curves and surfaces based on mathematical equations.