# Ch 16: Using Trigonometric Functions

### About This Chapter

In these lessons, practice using trigonometric functions to solve advanced equations. Get some help with your homework, cram for an upcoming exam, improve your grades, or just test your math skills by finding the solutions to sample problems.

## Using Trigonometric Functions - Chapter Summary

Just because you don't know all the measurements of a shape doesn't mean you don't have the tools needed to find those measurements. These lessons will show you how to apply trigonometric functions to find unknown variables. Each lesson provides a thorough explanation of related mathematical laws, theorems, and formulas, complete with relevant examples. Most of the lessons include sample problems that walk you through all the necessary steps. At the end of each lesson, try answering the quizzes to verify if you have absorbed all the information. This chapter has been constructed to give you the skills needed to do the following:

• Point out the uses for cosine and sine
• Offer examples of cosecant, secant, and cotangent functions
• Review the first quadrant of the unit circle
• Show how to connect right triangles to cosine and sine with unit circles
• Determine circular trigonometric functions
• Differentiate the properties and types of special right triangles
• Establish how special angles have trigonometric function values
• Outline the applications for the law of sines and the law of cosines
• Evaluate the double angle formula
• Figure out how to convert radians into degrees

12 Lessons in Chapter 16: Using Trigonometric 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

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### Other Chapters

Other chapters within the Precalculus: High School course

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