Videos and lessons with examples and solutions to help High School
Algebra 2 students learn about trigonometric identities.

Deriving Trigonometric Identities from Known Identities - This video shows that if you know about 2 or 3 identities and a few definitions, you can actually derive lots of other trigonometric identities easily!

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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