The following provides an outline of all the topics you would expect to see in a typical Trigonometry class (i.e., Precalculus or even Algebra II with Trig).
All of the topics are covered in detail in our Online Trig Course.
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- Practice Tests – Ensure you’re ready for your next quiz, test, or final.
An Overview of Trig Topics
An Overview of Trig Topics
The following sections contain links to our full lessons on all Trigonometry topics.
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Trigonometric Functions
8 Videos 119 Examples
- Interval Notation
- Coterminal Angles
- Reference Triangles
- Reference Angles
- Cofunctions
- Degrees Minutes Seconds
- Angles of Elevation and Depression
- Applications of Right Triangles
Radian Measure
4 Videos 66 Examples
- Degrees to Radians
- Arc Length Formula
- Unit Circle
- Angular and Linear Velocity
Graphing Trig Functions
4 Videos 21 Examples
- Graphing Sine and Cosine
- Graphing Sine and Cosine with Period Change
- Graphing Sine and Cosine with Phase Shift
- Graphing Reciprocal Trig Functions
Trig Identities
7 Videos 77 Examples
- Fundamental Trigonometric Identities
- Steps for Verifying Trig Identities
- Proving Trig Identities
- Sum and Difference Identities
- Double Angle Identities
- Half Angle Identities
- Product-Sum Identities
Trig Equations
4 Videos 53 Examples
- Inverse Functions
- Inverse Trig Functions
- Solving Trigonometric Equations
- Solving Trig Equations Using Inverses
Law of Sines and Cosines
4 Videos 16 Examples
- Law of Sines
- Law of Sines – Ambiguous Case
- Law of Cosines
- Heron’s Formula
Vector Applications
4 Videos 27 Examples
- What is a Vector?
- Displacement Vector
- Force Vector
- Velocity Vector
Polar Equations and Graphs
2 Videos 34 Examples
- Polar Coordinates
- Graphing Polar Equations
Complex Numbers
3 Videos 29 Examples
- Complex Numbers in Standard Form
- Complex Numbers in Polar Form
- De Moivre’s Theorem – Powers and Roots of Complex Numbers
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