# Ch 13: Real World Trigonometric Applications

In this overview of real-world trigonometric applications, you will learn how to graph cos(x), solve real world problems, determine trigonometry identity, and more. The brief lessons in this chapter can be a valuable resource to use when preparing for a test or working on class assignments.

## Real World Trigonometric Applications - Chapter Summary

As you go through these lessons on real-world trigonometric applications, you will learn how to solve trigonometric equations graphically and graph the cosecant function. Steps for using the law of cosine to solve a triangle are also covered. By the end of the chapter, you should be ready to:

• Graph sine and cosine wave transformations
• Use various properties to graph cos(x)
• Transform a tangent function by making minor changes to its equation
• Identify shifted and transformed graphs
• Determine trigonometric identity using graphs
• Use the law of cosine to solve oblique triangles and real-world problems
• Prove the addition and subtraction formula for tangent

These interactive lessons provide illustrations that help you easily understand the topics presented. You can go through all of the lessons in the chapter, or just those subjects that you need to review. You can use the Help feature to submit a question to an instructor if you get stuck on a specific topic. Additionally, a brief quiz is available for each lesson to test your understanding of topics covered.

11 Lessons in Chapter 13: Real World Trigonometric Applications
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.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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