Creating an Equation Driven Curve To create an equation driven curve: On the Sketch toolbar, click the Spline flyout, and then select Equation Driven Curve or click Tools > Sketch Entities > Equation Driven Curve . Under Equation Type, select Explicit or Parametric.3D sketches support parametric equations only. Under Equation, specify the curve equation where: Y is a function of X (explicit equations). x^3/"D1@Sketch5" You can use any functions supported in the Equations dialog box. For example: 2*(x + 3*sin(x)) X, Y, and Z are functions of T (parametric equations). For example:Let x be defined by: sin(t) Let y be defined by: cos(t) For t1 = 0 and t2 = pi, the result is a semi-circle. (Closed geometry is not allowed.) Z is for 3D sketches only. Under Parameters, specify the range of values for X (explicit equations) or T (parametric equations), where 1 is the start point and 2 is the end point (for example, X1 = 0 and X2 = 2*pi). Click to lock or unlock the start or end point location on the curve: (locked): The start or end point is fixed. (unlocked): You can drag the start or end point along the curve. Click .The curve defined by the equation appears in the sketch. Parent topicEquation Driven Curves Related reference Equation Driven Curve PropertyManager