Chapter 5 · Precalculus
Trigonometric Functions
Angles in degrees and radians, arc length and sector area, the unit circle, all six trigonometric functions, and right-triangle trigonometry.
226 of the 418 problems this chapter sets.
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Precalculus 2e: Access for free at https://openstax.org/books/precalculus-2e/pages/1-introduction-to-functions