Introduction to Basic Angles: Explanation of the specific trigonometric ratios (sine, cosine, and tangent) for the fundamental angles of 0° and 90° in a right triangle.
Definition and Calculation: A step-by-step breakdown of how the trigonometric ratios are derived using the unit circle or right triangle definitions.
Special Values: Highlighting the exact values of trigonometric ratios at 0° (e.g., sin(0°) = 0, cos(0°) = 1, tan(0°) = 0) and 90° (e.g., sin(90°) = 1, cos(90°) = 0, tan(90°) is undefined).
