Radians: A unit for measuring angles in terms of arc length on a circle rather than degrees. π/6 is expressed in radians since it indicates an angular measurement.
Central Angle: An angle whose vertex lies at the center of a circle and whose sides are radii (lines from center to any point on circumference). π/6 represents a central angle in this context.
Trigonometric Functions: Mathematical functions (e.g., sin, cos) that relate angles of a right triangle to ratios of the lengths of its sides. π/6 is commonly used in trigonometry to evaluate these functions at specific angles.