Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! ðŸ™‚ https://www.patreon.com/patrickjmt !! Conic Sections: Parabolas, Part 3 ( Focus and Directrix). Just another example of finding the focus and directrix for a parabola (a slightly more involved example).

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The dot product is a means for taking two vectors, which have magnitude and direction, and multiplying them to get a number, or a scalar. The topic is typically taught in College Level Calculus classes, in topics such as Vector Calculus and Multivariate Calculus. To multiply two vectors, you’ll need to actually break them down…

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Visit http://ilectureonline.com for more math and science lectures! In this video I will find dz/dt=? of z=(x^2)y, where x=t^2, and y=t^3 using the change rule. Next video in the series can be seen at: https://youtu.be/q4R1eXfPzHQ