Exact Values for Sin, Cos, and Tan on the Unit Circle

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# Exact Values for Sin, Cos, and Tan on the Unit Circle - PowerPoint PPT Presentation

Exact Values for Sin, Cos, and Tan on the Unit Circle. What are special right triangles? How do I find values for sin, cos , tan on the unit circle without using my calculator?. Special Right Triangles.

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## Exact Values for Sin, Cos, and Tan on the Unit Circle

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Presentation Transcript
1. Exact Values for Sin, Cos, and Tan on the Unit Circle What are special right triangles? How do I find values for sin, cos, tan on the unit circle without using my calculator?

2. Special Right Triangles A special right triangleis a right triangle with some regular feature that makes calculations on the triangle easier, or for which simple formulas exist. There are 2 special right triangles and

3. Now lets see how that is useful on the unit circle Remember a unit circle has a radius of 1 Each point on the circle adheres with a specific degree for the circle and at this point there is an exact value for sine and cosine (using radian measure NOT A DECIMAL)

4. Here are the exact values