Chapter 7 · Algebra and Trig
The Unit Circle: Sine and Cosine Functions
Angles in degrees and radians, arc length and sector area, the unit circle, and the other four trigonometric functions.
226 of the 417 problems this chapter sets.
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Algebra and Trigonometry 2e: Access for free at https://openstax.org/books/algebra-and-trigonometry-2e/pages/1-introduction-to-prerequisites