Ch 14: McDougal Littell Algebra 2 Chapter 14: Trigonometric Graphs, Identities, and Equations

About This Chapter

The Trigonometric Graphs, Identities, and Equations chapter of this McDougal Littell Algebra 2 textbook companion course helps students learn the essential algebra 2 lessons of trigonometric graphs, identities, and equations. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Trigonometric Graphs, Identities, and Equations textbook chapter.

How it works:

  • Identify the lessons in the McDougal Littell Algebra 2 Trigonometric Graphs, Identities, and Equations chapter with which you need help.
  • Find the corresponding video lessons within this companion course chapter.
  • Watch fun videos that cover the trigonometric graphs, identities, and equations topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Graphs of sine and cosine
  • Graphs of tangent functions
  • Sine and cosine transformation graphs
  • Basic trig identities
  • Alternate forms of basic trigonometric identities
  • Methods for proving trig identities
  • Applications for trigonometric functions
  • Trigonometric equations
  • Sum and difference formulas
  • Double and half-angle formulas
  • Half-angle identities

McDougal Littell Algebra 2 is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

9 Lessons in Chapter 14: McDougal Littell Algebra 2 Chapter 14: Trigonometric Graphs, Identities, and Equations
Test your knowledge with a 30-question chapter practice test
Graphing Sine and Cosine

1. Graphing Sine and Cosine

Sine and cosine aren't just for triangles; they can also be waves. See them graphed on the unit circle and then learn how that translates into the sine and cosine waves.

Graphing the Tangent Function: Amplitude, Period, Phase Shift & Vertical Shift

2. Graphing the Tangent Function: Amplitude, Period, Phase Shift & Vertical Shift

Take a look at how the graph of a tangent function and how we can transform it by making a few small changes to its equation. This video shows how to graph the original function and explains its transformations.

Graphing Sine and Cosine Transformations

3. Graphing Sine and Cosine Transformations

What happens when we take the sine and cosine wave and transform them? They get bigger, smaller, faster and slower. Find out how in this lesson on sine and cosine wave transformations.

List of the Basic Trig Identities

4. List of the Basic Trig Identities

There are specific trig functions that have very special and very simple relationships with each other. Learn the main one and how you can use it to understand the others.

Alternate Forms of Trigonometric Identities

5. Alternate Forms of Trigonometric Identities

After watching this video lesson, you will know some of the alternate forms of the basic trigonometric identities. You will also learn how to use these alternate forms.

How to Prove & Derive Trigonometric Identities

6. How to Prove & Derive Trigonometric Identities

After watching this video lesson, you will learn how some of our trigonometric identities are derived. You will also see how some identities naturally lead to the others.

How to Solve Trigonometric Equations for X

7. How to Solve Trigonometric Equations for X

Adding trigonometric functions into standard algebra equations adds complexity. Learn how to solve trigonometric equations for x and how to use inverse operations to simplify equations.

The Double Angle Formula

8. The Double Angle Formula

When you encounter a doubled angle, there are special formulas that can help you handle trigonometric value. In this lesson, we'll define and practice using the double angle formulas for sine, cosine and tangent.

Half-Angle Identities: Uses & Applications

9. Half-Angle Identities: Uses & Applications

After watching this video lesson, you will be able to use half-angle identities to help you simplify your trig problems and also to help you prove other trig statements.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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