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Khan Academy
Focus and Directrix of a Parabola 2
Continuing from a previous video, Sal takes the discussion of the focus and directrix of the parabola further. Given the parabola, y=x2, he derives the focus and directrix by matching parts of the equation he found earlier. He then comes...
Curated OER
Focus and Directrix of a Parabola 2
Continuing from a previous video, Sal takes the discussion of the focus and directrix of parabola further. Given the parabola, y=x2, he derives the focus and directrix by matching parts of the equation he found earlier. He then, comes up...