# Ch 37: Understanding Trigonometry

These lessons can help you understand various aspects of trigonometry, such as trigonometric identities, inverse trigonometric functions, and roots of unity. You'll find these short lessons and quizzes to be a great refresher on trigonometry and useful when studying for a test.

## Understanding Trigonometry - Chapter Summary

The lessons in this chapter provide an overview of trigonometry. You'll learn about the different kinds of trigonometric identities, how to use complex numbers in polar form, what a restricted domain means, and more. After completing the chapter, you should be able to:

• Solve trigonometric equations using trigonometric identities and inverses
• Use inverse operations to simplify equations
• Solve trigonometric equations with restricted domains and infinite solutions
• Analyze the vertices, base, and height of a triangle
• Explain why inverse trigonometric functions have a limited range
• Combine complex numbers using addition, subtraction, and multiplication
• Detail how roots of unity are used

For video lessons, the timelines let you easily navigate to specific topics. You can review all the lessons in order, or just look at the ones that cover the topics you need to review. A brief multiple-choice quiz is available with each lesson to test your knowledge. If you get stuck on a topic, use the Help tab to submit questions to our expert instructors.

9 Lessons in Chapter 37: Understanding Trigonometry
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.