Key Concepts:
- Radians and Degrees – Conversion using (180^\circ = \pi) radians.
- Unit Circle – Defines sine, cosine, and tangent for all angles.
- Trigonometric Ratios – See Chapter 3, Lesson 2.
Skills Covered:
- Converting between radians and degrees.
- Finding sine, cosine, and tangent for key angles using the unit circle.
Example Problem:
- Find the degree measure of an angle that measures (\frac{9\pi}{20}) radians.