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Chapter 13: Problem 36

Write an equation for each translation. \(y=\sin x, 3 \pi\) units down

Short Answer

Expert verified
The equation for the translation of the function \(y =\sin x\) down by \(3\pi\) units is \(y = \sin x - 3\pi\).

Step by step solution

01

Identify the Translation Direction and Units

First, we need to identify the direction of the translation. Here, the translation is 3蟺 units down. The down direction implies a subtraction in function values.
02

Formulate the Translated function

The next step is to apply the translation to the original function \(y=\sin x\). This is done by adjusting the y-value of the existing function by the number of units of translation. Since the translation is down, we perform subtraction. This gives us the translated function which is \(y = \sin x - 3\pi\).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Basics of Function Translation
Function translation is all about shifting a graph from one location to another on the coordinate plane. When a function is translated, its original shape remains unchanged. Imagine sliding a picture across a table - the picture doesn't change, just its position.

In mathematics, function translations can move the graph:
  • Up or down
  • Left or right
With translation, you're adding or subtracting a value from the function's equation. A move down reduces the y-values, while a move up increases them. In our exercise, the sine function is adjusted downward, which involves subtracting the value from the y-coordinates.
Understanding the Sine Function
The sine function, represented as \(y = \sin x\), is a periodic function. This means it repeats its values in regular intervals. The key features of the sine function include oscillations between -1 and 1, a period of \(2\pi\), and symmetry about the origin.

This type of function is fundamental in trigonometry and appears often in wave-based phenomena, such as sound or light waves. Knowing how to work with the sine function provides a solid foundation in exploring more advanced trigonometric concepts.

The sine graph creates smooth waves, making understanding its translations a crucial skill when visualizing modifications.
Application of Graph Transformations
Graph transformations encompass various operations like translations and reflections applied to a graph. In the case of our sine function exercise, the transformation involved was a vertical translation. Here are some essential aspects to remember:
  • Vertical Translations: Moving the graph up or down by changing the y-values in the function.
  • Horizontal Translations: Shifting the graph left or right, affecting the input of the function.
In the exercise, the sine function was translated down by \(3\pi\) units. This is represented by subtracting \(3\pi\) from the function: \(y = \sin x - 3\pi\). This way, each point on the original graph slides down \(3\pi\) units, maintaining the overall shape.
Function Translations in Algebra 2
Graphical transformations are a key topic in Algebra 2, where you delve into more complex functions and their manipulations. Understanding how translations impact a graph helps solidify your knowledge of algebraic expressions.

When dealing with function translations:
  • Identify whether the changes affect the x-values (horizontal) or y-values (vertical).
  • Apply the appropriate transformation by adding or subtracting values.

Algebra 2 often explores these concepts in more depth. By mastering translations, you gain a stronger handle on predicting the effects of algebraic changes without reshaping the entire function.

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Most popular questions from this chapter

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