# Ch 4: Logarithms & Trigonometry

### About This Chapter

View the brief video lessons in this chapter to explore logarithms and trigonometry. Definitions, formulas, and identities will help you master these mathematic concepts.

## Logarithms & Trigonometry - Chapter Summary

Our instructors will teach you the basics of logarithmic math and trigonometry. Learn the definition of a logarithm, change of base formula and natural logarithm function.

You will also be introduced to the six trigonometric functions, their formulas and plenty of examples. You'll look at arbitrary angles and the use of the Pythagorean Theorem in trigonometry. Explore trig identities and their graphs. After completing the lessons in this chapter, you will have learned:

• Exponentials, logarithms and the natural log
• Basic trigonometric identities
• Real number trig functions
• Uses for trig identities
• How graphs are used to determine trig identities
• Inverse trig functions

Our brief, engaging video lessons help you master math concepts more quickly and remember the material longer. Review as often as you like and move through the chapter at your own pace - topic review is quick and easy using the video tags on the timeline in each lesson. Complete the optional quiz as you complete each lesson to confirm your understanding of the topic.

8 Lessons in Chapter 4: Logarithms & 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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### Other Chapters

Other chapters within the GRE Math: Study Guide & Test Prep course

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