Directrix Equation Formula (Standard Equation y² = 2px )
Formula: Directrix l: x = - (p)/(2) Conditions: Standard equation y² = 2px (p > 0). Explanation: The directrix is a line perpendicular to the axis of symmetry…
Syllabus path: Geometry and Algebra › Plane Analytic Geometry › Equations and Properties of Parabolas
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This formula is aligned to the CSCA undergraduate admissions exam syllabus. Continue with the linked tutorial and topic practice.
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CSCA Mathematics Formula Reference
Formula and explanation
Formula: Directrix l: x = - (p)/(2) Conditions: Standard equation y² = 2px (p > 0). Explanation: The directrix is a line perpendicular to the axis of symmetry (x - axis). The distances from the focus and the vertex to the directrix are equal.
Related tutorial and examples
Equations and Properties of Parabolas
Equations and Properties of Parabolas The parabola is the only conic section with an "eccentricity e = 1 ". The key to this topic is applying the geometric definition. In the CSCA exam, mastering the four standard equations and using the "Definition Method" are crucial. 1. Defini…
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