Quick Method to Find Intersection Coordinates of a Focal Chord of a Parabola скачать в хорошем качестве

Quick Method to Find Intersection Coordinates of a Focal Chord of a Parabola

More difficult maths-based College Entrance Exams, as well as specialised math-based High School exams, frequently ask questions regarding the focal chord of a parabola (ie any chord which passes through the focus of the parabola). Knowing the coordinates of one end of the chord, we can very quickly find the coordinates of the other end using parametric equations, as we show in this video. As a bonus, at 5:50 we find the equation for the length of the focal chord, the formula for which simplifies nicely, and which again is well worth knowing as an exam time saver. For more videos on parabolas, see our playlist 'Conic Sections'    • Conic Sections   For more videos on parametric equations, see our playlist 'Parametric Equations'    • Parametric Equations   For more videos on College Entrance Exams see our playlist 'UPCAT and Other CETs'    • College Entrance Test Practice   For more videos on GMAT see our playlist 'GMAT/GRE'    • GMAT / GRE   For more videos on quadratic equations (which are more familiar parabolas) see our playlist    • Quadratic Equations