# Ch 9: Working with Quadratic Functions in Trigonometry: Help and Review

The Working with Quadratic Functions chapter of this High School Trigonometry Help and Review course is the simplest way to master quadratic functions. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of working with quadratic functions.

## Who's it for?

Anyone who needs help learning or mastering high school trigonometry material will benefit from taking this course. There is no faster or easier way to learn high school trigonometry. Among those who would benefit are:

• Students who have fallen behind in understanding how to factor, solve and graph quadratic equations, quadratic inequalities and systems of quadratic inequalities
• Students who struggle with learning disabilities or learning differences, including autism and ADHD
• Students who prefer multiple ways of learning math (visual or auditory)
• Students who have missed class time and need to catch up
• Students who need an efficient way to learn about quadratic functions
• Students who struggle to understand their teachers
• Students who attend schools without extra math learning resources

## How it works:

• Find videos in our course that cover what you need to learn or review.
• Press play and watch the video lesson.
• Refer to the video transcripts to reinforce your learning.
• Test your understanding of each lesson with short quizzes.
• Verify you're ready by completing the Working with Quadratic Functions in Trigonometry chapter exam.

## Why it works:

• Study Efficiently: Skip what you know, review what you don't.
• Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
• Be Ready on Test Day: Use the Working with Quadratic Functions in Trigonometry chapter exam to be prepared.
• Get Extra Support: Ask our subject-matter experts any quadratic functions question. They're here to help!
• Study With Flexibility: Watch videos on any web-ready device.

## Students will review:

This chapter helps students review the concepts in a quadratic functions unit of a standard high school trigonometry course. Topics covered include:

• Writing parabolas in standard, intercept and vertex forms
• Factoring quadratic equations using FOIL in reverse
• Completing the square
• Solving quadratic equations by factoring
• Solving quadratics with complex numbers as the solution
• Graphing and solving quadratic inequalities
• Graphing a system of quadratic inequalities
• Applying quadratic functions to solve projectile motion problems
• Using quadratic functions to model a given data set

10 Lessons in Chapter 9: Working with Quadratic Functions in Trigonometry: Help and Review
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.