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, X_{1} = 0 and X_{2} = 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 Equation Driven Curve PropertyManager