To create an equation curve, select a part face or work plane to use as the sketch plane. In an empty 2D sketch file, select the sketch plane, and then start to sketch.
Show Me how to create and use equation curves
Create equation curve
Cartesian equation curves use X, Y coordinates. Parametric equation curves use equations to define x and y as a function of a variable t.
On the ribbon, click Sketch tab Draw panel Equation Curve.
Then select the type:
Parametric Cartesian
In the x(t) box, enter the equation for x as a function of t.
In the y(t) box, enter the equation for y as a function of t.
In tmin and tmax, enter the minimum and maximum values for t in the tmin and tmax fields.
Explicit Cartesian
In the y(x) box, enter the equation for y as a function of x.
In xmin and xmax, enter the minimum and maximum values for x.
Parametric Polar
In the r(t) box, enter the equation for r as a function of t.
In the θ(t) box, enter the equation for θ as a function of t.
In xmin and xmax, enter the minimum and maximum values for t.
Explicit Polar
In the r(a) box, enter the equation for r as a function of a.
In xmin and xmax, enter the minimum and maximum values for a.
Click OK to create the curve and exit the command. Click Apply to create the curve and remain in the command.