Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
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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Question

Transcribed Image Text:### Understanding the Graph of \( \cos(\theta) \)
#### Description:
The following image represents the graph of \( f(\theta) = \cos(\theta) \), where \( -\pi \leq \theta \leq \pi \).
#### Detailed Analysis:
1. **Axes and Scale**:
- The horizontal axis (x-axis) represents the angle \( \theta \).
- The vertical axis (y-axis) represents the value of the cosine function \( \cos(\theta) \).
- The graph spans from \( -2\pi \) to \( 2\pi \) on the \( \theta \)-axis.
2. **Graph Characteristics**:
- The graph starts at \( \theta = -\pi \) with \( f(\theta) \approx -1 \).
- At \( \theta = 0 \), \( f(\theta) = 1 \).
- The graph ends at \( \theta = \pi \) with \( f(\theta) \approx -1 \).
- The cosine curve shows its periodic nature as it oscillates between -1 and 1.
3. **Critical Points**:
- Maxima: The graph reaches its maximum value at \( \theta = 0 \) where \( f(\theta) = 1 \).
- Minima: The graph reaches its minimum value at \( \theta = \pm \pi \) where \( f(\theta) = -1 \).
- Zeros: The function intersects the x-axis at \( \theta = \pm \frac{\pi}{2}, \pm \frac{3\pi}{2}, \dots \).
#### True/False Statement:
- Below the graph, there is a statement with a True or False option. The specific statement is not explicitly shown in the image.
Please verify the details provided and understand the key features of the cosine function as illustrated in the graph.
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