Determine whether the following curve uses arc length as a parameter. If not, find a description that uses arc length as a parameter. 1 cost, sin t, for 0 sts9 V2 r(t) = cost Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. O A. r(t) does not use arc length as a parameter. A description of the curve that uses arc length as a parameter is r(s) = ( for (Type exact answers, using radicals as needed.) O B. r(t) uses arc length as a parameter.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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**Analysis of Arc Length as a Parameter in Curves**

**Problem Statement:**

Determine whether the following curve uses arc length as a parameter. If not, find a description that uses arc length as a parameter.

\[
r(t) = \left\langle \frac{1}{\sqrt{2}} \cos t, \frac{1}{\sqrt{2}} \cos t, \sin t \right\rangle, \text{ for } 0 \leq t \leq 9
\]

**Options:**

- **A.** \( r(t) \) does not use arc length as a parameter. A description of the curve that uses arc length as a parameter is \( r(s) = \left\langle \text{\_\_\_}, \text{\_\_\_}, \text{\_\_\_} \right\rangle \) for \(\text{\_} \leq s \leq \text{\_}\). (Type exact answers, using radicals as needed.)

- **B.** \( r(t) \) uses arc length as a parameter.

**Explanation:**

This problem requires checking if the given parametric equation uses arc length as a parameter. If not, it instructs to convert it to an arc length parameterization. The main task involves calculating the derivative, using it to find arc length, and re-parameterizing accordingly if needed. The boxes in option A are placeholders for exact answers to be filled with the necessary calculations once determined.
Transcribed Image Text:**Analysis of Arc Length as a Parameter in Curves** **Problem Statement:** Determine whether the following curve uses arc length as a parameter. If not, find a description that uses arc length as a parameter. \[ r(t) = \left\langle \frac{1}{\sqrt{2}} \cos t, \frac{1}{\sqrt{2}} \cos t, \sin t \right\rangle, \text{ for } 0 \leq t \leq 9 \] **Options:** - **A.** \( r(t) \) does not use arc length as a parameter. A description of the curve that uses arc length as a parameter is \( r(s) = \left\langle \text{\_\_\_}, \text{\_\_\_}, \text{\_\_\_} \right\rangle \) for \(\text{\_} \leq s \leq \text{\_}\). (Type exact answers, using radicals as needed.) - **B.** \( r(t) \) uses arc length as a parameter. **Explanation:** This problem requires checking if the given parametric equation uses arc length as a parameter. If not, it instructs to convert it to an arc length parameterization. The main task involves calculating the derivative, using it to find arc length, and re-parameterizing accordingly if needed. The boxes in option A are placeholders for exact answers to be filled with the necessary calculations once determined.
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