Understanding Piecewise Smooth Parameterization

This video tutorial explains how to define a piecewise smooth parameterization of paths in the xy-plane, a crucial skill for evaluating line integrals. It covers three examples: a square, an ellipse, and a cubic path. Each example demonstrates how to break down a curve into smooth segments using parameterization, ensuring continuity of the parameter t. The tutorial also highlights the use of trigonometric identities for parameterizing an ellipse and provides step-by-step guidance on creating vector-valued functions for each path.

What is the primary goal of defining a piecewise smooth parameterization in the context of line integrals?

• To ensure the path is a straight line.

• To increase the complexity of the path.

• To make the path as short as possible.

• To ensure each segment of the path is smooth and continuous.

When parameterizing the first side of a square path from (0,0) to (2,0), what is the correct expression for x?

• x = 0

• x = t^2

• x = t

• x = 2t

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CCSS.HSA.CED.A.3

For the second side of the square path from (2,0) to (2,2), how is y parameterized?

• y = t

• y = t - 2

• y = 2t

• y = 2

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CCSS.HSF.TF.A.4

What trigonometric identity is used to parameterize an ellipse?

• sin^2(t) + cos^2(t) = 1

• cos^2(t) - sin^2(t) = 1

• sin(t) + cos(t) = 1

• tan^2(t) + sec^2(t) = 1

In the parameterization of an ellipse, what is the expression for x?

• x = 2cos(t)

• x = 2sin(t)

• x = 3cos(t)

• x = 3sin(t)

For the path following a cubic function, what is the expression for y when x = t?

• y = t^2

• y = t^3

• y = 2t

• y = 3t

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CCSS.HSF-IF.C.7B

What is the starting point of the path that follows the cubic function?

• (1,1)

• (4,16)

• (2,8)

• (0,0)

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CCSS.6.EE.C.9

In the linear path from (2,8) back to the origin, what is the expression for x?

• x = 4 - t

• x = 2 - t

• x = t - 2

• x = t + 2

What is the expression for y in the linear path from (2,8) to (0,0)?

• y = 8 - 4t

• y = 4t - 8

• y = 8 + 4t

• y = 4 - 8t

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CCSS.8.EE.B.5

What is the significance of the slope in the linear path from (2,8) to (0,0)?

• It determines the rate at which y decreases.

• It determines the rate at which x increases.

• It ensures the path is a straight line.

• It ensures the path is a curve.

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CCSS.8.EE.B.5