Unit circle trigonometry

This study guide covers the unit circle, focusing on its basics (radius, origin, angles in radians and degrees, coordinates using cos(θ) and sin(θ)). It details the relationship between angles and coordinates, emphasizing initial and terminal sides. Key sine, cosine, and tangent values for common angles are highlighted, along with trigonometric ratios (SOHCAHTOA, ASTC). The guide also explains how to apply these ratios in right triangles to find side lengths and angles using inverse trigonometric functions. Finally, it provides practice questions and exam tips.