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Parametric Equations
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Basic Derivative of Parametric Equations
For parametric equations and , the derivative is computed as provided .
Second Derivative of Parametric Equations
The second derivative,
Arc Length of a Parametric Curve
The arc length from to for the curve defined by and is given by the integral
Area Under Parametric Curve
For a parametric curve defined by and , the area under the curve from to is given by
Tangent Line to a Parametric Curve
The equation of the tangent line to a parametric curve at a point is given by , where and .
Parametric Equation and Horizontal Tangents
A parametric curve defined by and has horizontal tangents where as long as at these points.
Parametric Equation and Vertical Tangents
A parametric curve has vertical tangents where provided that at these points.
Integration by Parts with Parametric Equations
To integrate products of derivatives of parametric functions (e.g., ), use integration by parts:
Parametric Equations and Area Between Curves
The area between two parametric curves , and , from to is
Curve Tracing for Parametric Equations
Curve tracing involves plotting a parametric curve and by varying the parameter . Critical points, inflection points, and behavior at endpoints provide insights into the shape of the curve.
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