2. Find the lengths of both circular arcs of the unit circle connecting the point (–V2/2, -V2/2) and the endpoint of the radius the makes an angle of 8 radians with the positive hori- zontal axis.

Calculus: Early Transcendentals
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Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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**Problem 2: Calculating Arc Lengths on a Unit Circle**

Given: Determine the lengths of both circular arcs on the unit circle connecting two specific points:

1. The point is given as \((- \sqrt{2}/2, - \sqrt{2}/2)\).
2. The endpoint of a radius that makes an angle of 8 radians with the positive horizontal axis (x-axis).

Objective: Calculate the lengths of the minor and major circular arcs connecting the specified points on the unit circle.

**Steps to Solve:**

1. **Coordinate Identification:**
   - Identify the coordinates \((- \sqrt{2}/2, - \sqrt{2}/2)\) on the unit circle. Given that the unit circle has a radius of 1, this point lies on the circle where both x and y coordinates are \(- \sqrt{2}/2\).

2. **Angle Calculation:**
   - Compute the angle formed at the center of the circle between the point and the radius ending at 8 radians.
   - Convert angle in radians within the range \([0, 2\pi]\) to identify the corresponding point on the circle.

3. **Arc Length Formula:**
   - Use the arc length formula for the unit circle \( s = r\theta \), where \(r=1\) (radius of the unit circle) and \(\theta\) is the central angle.
   - Calculate minor and major arc lengths connecting the two points using relevant angles.

**Example Diagram:**
- This problem involves an understanding of trigonometric functions and the geometry of the circle. Although no graph is provided here, drawing a unit circle with labeled axes helps visualize the calculations and angles involved.

By following these steps and correctly applying trigonometric principles, students can accurately determine the lengths of both circular arcs on the unit circle.
Transcribed Image Text:**Problem 2: Calculating Arc Lengths on a Unit Circle** Given: Determine the lengths of both circular arcs on the unit circle connecting two specific points: 1. The point is given as \((- \sqrt{2}/2, - \sqrt{2}/2)\). 2. The endpoint of a radius that makes an angle of 8 radians with the positive horizontal axis (x-axis). Objective: Calculate the lengths of the minor and major circular arcs connecting the specified points on the unit circle. **Steps to Solve:** 1. **Coordinate Identification:** - Identify the coordinates \((- \sqrt{2}/2, - \sqrt{2}/2)\) on the unit circle. Given that the unit circle has a radius of 1, this point lies on the circle where both x and y coordinates are \(- \sqrt{2}/2\). 2. **Angle Calculation:** - Compute the angle formed at the center of the circle between the point and the radius ending at 8 radians. - Convert angle in radians within the range \([0, 2\pi]\) to identify the corresponding point on the circle. 3. **Arc Length Formula:** - Use the arc length formula for the unit circle \( s = r\theta \), where \(r=1\) (radius of the unit circle) and \(\theta\) is the central angle. - Calculate minor and major arc lengths connecting the two points using relevant angles. **Example Diagram:** - This problem involves an understanding of trigonometric functions and the geometry of the circle. Although no graph is provided here, drawing a unit circle with labeled axes helps visualize the calculations and angles involved. By following these steps and correctly applying trigonometric principles, students can accurately determine the lengths of both circular arcs on the unit circle.
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