# Ch 15: Triangle Trigonometry

Take a closer look at these lessons to gain insight about the steps needed for performing triangle trigonometry. Prepare for a test, improve your grades, or just use this chapter as supplemental information for your current trigonometry class.

## Triangle Trigonometry - Chapter Summary

Early mathematicians studied the relationships among the angles and the sides of triangles, and by doing so developed the laws and theorems of trigonometry that we use for solving advanced equations. These lessons about triangle trigonometry give you a deeper understanding of the most essential theorems, formulas, and concepts needed for solving sample trigonometric equations.

While this chapter does address a significant amount of information, our instructors have found ways to make everything easier to understand. For starters, each chapter has been split into miniaturized lessons, so instead of scrolling through a seemingly endless chapter, you can pick the individual lesson topics you want to go over. We also keep each lesson brief, making sure you remain focused on the most essential information. By completing this chapter, you will be able to do the following:

• Describe trigonometric similarity and ratios
• Identify how to find trigonometric ratios
• Analyze the cosine and sine of complementary angles
• Point out steps for solving right triangle sample problems
• Review the use and applications of the Pythagorean Theorem
• Show how to use the Pythagorean Theorem for finding distances
• Determine how the Pythagorean Theorem applies to trigonometry
• Establish finding the area of a triangle using sine
• Apply the law of cosines and the law of sines to practice problems

6 Lessons in Chapter 15: Triangle 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

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