Trigonometry, Unit Circle Pythagorean Identity - Cos/Sin to Identity (Degrees, Squared Notation)

This math topic focuses on trigonometry and the unit circle, specifically utilizing the Pythagorean identity. Students learn to establish relationships between the sine and cosine of angles expressed in degrees using squared notation. The problems involve calculating or deducing the values of sine or cosine based on the Pythagorean theorem as applied to different triangles within the unit circle context. Each question presents the scenario in a visual format followed by a set of answer choices, requiring the application of formulas like \(\sin^2(\theta) + \cos^2(\theta) = 1\).

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.