# Ch 26: Applications of Trigonometry: Help and Review

### About This Chapter

## 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 solve real-world problems using the law of sines and the law of cosines or the addition and subtraction formulas for trigonometric functions
- 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 the applications of trigonometry
- 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 Applications of 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 Applications of Trigonometry chapter exam to be prepared.**Get Extra Support**: Ask our subject-matter experts any trigonometric applications 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 an applications of trigonometry unit of a standard high school trigonometry course. Topics covered include:

- Solving oblique triangles using the law of cosines
- Using the law of sines to solve oblique triangles
- Proving the addition and subtraction formulas for trigonometric functions

### 1. Solving Oblique Triangles Using the Law of Cosines

The law of cosines can be used to solve for a missing measure of a triangle. Understand the law of cosines and learn how to use it in solving oblique triangles by practicing through the given examples.

### 2. Solving Real World Problems Using the Law of Cosines

Discover how the law of cosines is used by surveyors and others to solve problems in the real world. Review the law of cosines, explore real world uses, and look closer at two examples to better understand its real-world application.

### 3. Using the Law of Sines to Solve a Triangle

The law of sines is useful in solving a triangle since it makes use of the relationships of the sides and angles of a triangle. Learn how to solve triangles using the law of sines through the given examples.

### 4. Solving Real World Problems Using the Law of Sines

One way to solve the missing measurement of sides and angles of triangles is by using the law of sines. Explore the law of sines and learn how to use it in solving real-world problems by working through some examples.

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### Other Chapters

Other chapters within the High School Trigonometry: Help and Review course

- Real Numbers - Types and Properties: Help and Review
- Working with Linear Equations in Trigonometry: Help and Review
- Working with Inequalities in Trigonometry: Help and Review
- Absolute Value Equations in Trigonometry: Help and Review
- Working with Complex Numbers in Trigonometry: Help and Review
- Systems of Linear Equations in Trigonometry: Help and Review
- Mathematical Modeling in Trigonometry: Help and Review
- Introduction to Quadratics in Trigonometry: Help and Review
- Working with Quadratic Functions in Trigonometry: Help and Review
- Coordinate Geometry Review: Help and Review
- Functions for Trigonometry: Help and Review
- Understanding Function Operations in Trigonometry: Help and Review
- Graph Symmetry in Trigonometry: Help and Review
- Graphing with Functions in Trigonometry: Help and Review
- Basic Polynomial Functions in Trigonometry: Help and Review
- Higher-Degree Polynomial Functions in Trigonometry: Help and Review
- Rational Functions in Trigonometry: Help and Review
- Trig - Rational Expressions & Function Graphs: Help & Review
- Exponential & Logarithmic Functions in Trigonometry: Help and Review
- Trigonometric Functions: Help and Review
- Geometry in Trigonometry: Help and Review
- Triangle Trigonometry: Help and Review
- Working with Trigonometric Graphs: Help and Review
- Trigonometric Equations: Help and Review
- Working with Trigonometric Identities: Help and Review
- Analytic Geometry & Conic Sections in Trigonometry: Help and Review
- Vectors, Matrices & Determinants in Trigonometry: Help and Review
- Polar Coordinates & Parameterizations: Help and Review
- Circular Arcs, Circles & Angles: Help and Review
- TASC Math: Trigonometry