# Ch 9: Big Ideas Math Algebra 2 - Chapter 9: Trigonometric Ratios and Functions

The Trigonometric Ratios and Functions chapter of this Big Ideas Math Algebra 2 Companion Course aligns with the same chapter in the Big Ideas Math Algebra 2 textbook. These simple and fun video lessons are about five minutes long and help you learn the essential lessons about important functions and theorems in trigonometry.

## How It Works:

• Find the lesson within this chapter that corresponds to what you're studying in the Trigonometric Ratios and Functions chapter of your textbook.
• Watch fun videos that cover the trigonometric ratio and function concepts you need to learn or review.
• Complete the quiz after watching each video lesson 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.

## Chapter Topics

You'll learn all of the algebra topics covered in the textbook chapter, including:

• Identifying the six main trigonometric functions
• Using the Pythagorean Theorem for functions
• What special angles are and their trigonometric value
• Using sine, cosine and tangent
• Defining terminal side and initial side
• What the parts of a circle are and how to use them
• Graphing sine, cosine and tangent functions
• How to find the sinusoidal function
• What trigonometric identities are and their uses
• How to apply the sum and difference identities

Big Ideas Math is a registered trademark of Larson Texts, Inc., which is not affiliated with Study.com.

19 Lessons in Chapter 9: Big Ideas Math Algebra 2 - Chapter 9: Trigonometric Ratios and Functions
Test your knowledge with a 30-question chapter practice test
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

### Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.