Friday, June 23, 2017 I've finished the concept discussion for Parabolas: Geometric Definition, Reflectors/Collectors, Derivation of Equations. I also added an alternate approach to Intersecting an Infinite Double Cone and a Plane: Looking at the Equations, based on insights from my genius husband Ray! Saturday, June 17, 2017 I've finished the second optional section, How is it that the Conic Discriminant tells us the Type of Conic? Wednesday, June 14, 2017 I've finished the exercises in Identifying Conics by the Discriminant. There are $\,27\,$ different cases—I'm pleased with the variety and level of randomness. Enjoy! Sunday, June 11, 2017 I added a JSXGraph dynamic graph to Identifying Conics by the Discriminant, so you can change the parameters on the equation $\,Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0\,$ using sliders, and immediately see the results. So cool! Thursday, June 8, 2017 I finished an optional section in the Precalculus course, Intersecting an Infinite Double Cone and a Plane: Looking at the Equations . There are no exercises in this section. Friday, June 2, 2017 I finished the concept discussion for Identifying Conics by the Discriminant . I updated my monthly stats for May. |
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