# Ch 16: Trigonometric Functions & Equations

Watch video lessons and review the fundamental principles and concepts of trigonometry. Get definitions of the laws of sine and cosine, learn to solve trigonometric equations and practice using a calculator for trig functions.

## Trigonometric Functions & Equations - Chapter Summary

The lessons in this chapter examine the basic functions and equations used in trigonometry, with examples and quizzes to help you grasp these concepts. Our instructors explain the laws of sine and cosine and how to use them and describe other trigonometric functions.

You'll see how to relate right triangles to sine and cosine, and look at the properties of special right triangles. Other lessons include practice problems with circular trigonometric functions, and there's also a list of the basic trig identities. Once you've completed these lessons, you should be ready to:

• Graph sine and cosine functions
• Identify cotangent, secant and cosecant
• Consider amplitude, period, phase shift and vertical shift when graphing the tangent function
• Relate right triangles to sine and cosine through the use of unit circles
• Utilize the double angle formula
• Convert between radians and degrees
• Solve trigonometric equations for x
• Use a calculator for trigonometric functions and exponentials

You'll enjoy learning about these topics through fun videos led by our expert instructors. The quizzes at the end of each lesson will aid in your understanding of what you've studied, and a jump feature in the timeline makes it easy to return to topics that require a little more attention. If you have questions, you can contact the instructor. Each lesson also includes a written transcript, so you can read along if that's how you learn best.

15 Lessons in Chapter 16: Trigonometric Functions & Equations
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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