**Function Analysis and Midline Calculation** **Function:** \[ Y = -8 \cos\left(6x + \frac{2\pi}{3}\right) + 4 \] **Question:** What is the midline of the function? Show your work and explain why. **Explanation:** The midline of a trigonometric function in the form of \( Y = A \cos(Bx + C) + D \) or \( Y = A \sin(Bx + C) + D \) is given by the value \( D \). This constant \( D \) shifts the graph vertically and represents the horizontal line around which the function oscillates. **Calculation:** In the given function: - The amplitude is \(-8\), which shows the maximum vertical distance from the midline. - The phase shift is determined by \(\frac{2\pi}{3}\), affecting the horizontal position of the graph. - The vertical shift, or midline, is represented by \(+4\). Therefore, the midline of the function is \( Y = 4 \). The midline \( Y = 4 \) is the central line around which the cosine function oscillates.

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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**Function Analysis and Midline Calculation**

**Function:**

\[ Y = -8 \cos\left(6x + \frac{2\pi}{3}\right) + 4 \]

**Question:**
What is the midline of the function? Show your work and explain why.

**Explanation:**

The midline of a trigonometric function in the form of \( Y = A \cos(Bx + C) + D \) or \( Y = A \sin(Bx + C) + D \) is given by the value \( D \). This constant \( D \) shifts the graph vertically and represents the horizontal line around which the function oscillates.

**Calculation:**

In the given function:

- The amplitude is \(-8\), which shows the maximum vertical distance from the midline.
- The phase shift is determined by \(\frac{2\pi}{3}\), affecting the horizontal position of the graph.
- The vertical shift, or midline, is represented by \(+4\).

Therefore, the midline of the function is \( Y = 4 \).

The midline \( Y = 4 \) is the central line around which the cosine function oscillates.
Transcribed Image Text:**Function Analysis and Midline Calculation** **Function:** \[ Y = -8 \cos\left(6x + \frac{2\pi}{3}\right) + 4 \] **Question:** What is the midline of the function? Show your work and explain why. **Explanation:** The midline of a trigonometric function in the form of \( Y = A \cos(Bx + C) + D \) or \( Y = A \sin(Bx + C) + D \) is given by the value \( D \). This constant \( D \) shifts the graph vertically and represents the horizontal line around which the function oscillates. **Calculation:** In the given function: - The amplitude is \(-8\), which shows the maximum vertical distance from the midline. - The phase shift is determined by \(\frac{2\pi}{3}\), affecting the horizontal position of the graph. - The vertical shift, or midline, is represented by \(+4\). Therefore, the midline of the function is \( Y = 4 \). The midline \( Y = 4 \) is the central line around which the cosine function oscillates.
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