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Algebra 2

The Unit Circle is an important tool that helps us visualize trigonometric ratios and more. Explore basic concepts such as how to measure Angles on the Unit Circle and find Coordinates on the Unit Circle. Drawing Triangles on the Unit Circle is a useful strategy for evaluating trigonometric functions in both Radians and Degrees. From Finding the Reference Angle to Plotting a Point on the Unit Circle, you will see how essential the Unit Circle is when studying trigonometry.

- Identifying Trigonometric Ratios from a Right Triangle
- Radians and Degrees
- The Unit Circle
- Radians and Degrees on the Unit Circle
- Angles on the Unit Circle
- Reference Angles
- Finding the Reference Angle
- Determining an Angle Measure
- Drawing an Angle on the Unit Circle
- Drawing an Angle Over 360 Degrees
- Drawing a Negative Angle
- Coordinates on the Unit Circle
- Finding a Missing Coordinate
- Determining the Angle that Corresponds to a Coordinate
- Determining the Coordinate that Corresponds to an Angle
- Triangles in the Unit Circle
- Trigonometric Functions on the Unit Circle
- Drawing a Triangle on the Unit Circle
- Positive and Negative Functions
- Plotting a Point on the Unit Circle
- Solving Trigonometric Functions on the Unit Circle

Study fundamental topics in college-level algebra with emphasis on application.

Grasp core concepts of statistics such as probability distributions, approximations, and hypothesis-testing.

Pathways are a sequence of tutorials that help you learn a whole subject area, one concept at a time. Choose from multiple teachers and teaching styles.

The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 25 of Sophia's online courses for college credit. These courses are eligible to transfer to many different colleges and universities.