Being slow is not necessarily bad because it gives the viewer time to think. That's not his fault, that's just the way it is. Sal can be quite slow at getting to the point. When watching videos, it's ok to watch them sped up. Go through those notes you've just taken and add side-notes on the important parts. If you get stuck, unpause until you're unstuck then pause again. Perhaps pause and try to predict what he's going to talk about. If you practice math poorly using KA, you will not be prepared. If you use Khan Academy well then you will see results. I'm in New Zealand, but we still do similar work as the US. And if given something like a bell curve you have to use limits to find the area between y=0 and the curve going to both infinity and negative infinity.Hi! I'm a teacher and my students use Khan Academy for their homework. Then limits come back when you have to perform them on derivitives and integrals.įor example in my statistics class I'm learning about how a distribution function should have a total probiblity of 1.
Then you learn some rules to do derivitives by hand and limits mainly come up in those derivations. Because first you begin with limits and using them to find derivitives, because derivitives are defined with limits. Not knowing limits will make you clueless to the first half of first year calc. I have yet to need an oval, and I suspect it will only come up in optics and accoustics
Then hyperbole is used a bit (maybe about 1 lecture) in proving the derivitive of lnx (as it is 1/x a hyperbole) and then it is used in hyperbolic trigonometry, which I've only seen in differential equations. Conic sections are important to get mainly at a high level, the most important one I would say is the parabola, because it is everywhere, then the circle, as it has a lot to do with trigonometry, which is in everything and one of the most useful things you will learn. I took pre calc a while ago so I can't remember every topic we went over, but if you ask I can give an opinion.
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