Khan academy and 3blue1brown are very good supplementary resources. They should never be used by themselves. You need an actual linear algebra book to go through too. Furthermore, if you want to learn more mathematical linear algebra (vector spaces, subspaces, etc.) then khan academy is completely insufficient.

Khan Academy is a good resource for so many things. If you already have basic calculus and linear algebra down, you might want to go for a more structured approach, while using Khan Academy as a reference. Here's some books and other resources that might help - mathematicalmonk on YouTube Mathematics for Machine Learning - Garrett Thomas

Jan 26, 2021 · I started with Khan Academy in the 'Pre-K - 8th Grade' section, starting from 2nd grade math, and working my way up towards 100% completion (Mastery Challenge) for every subject in every grade. Once I get to and finish the Algebra 1 and 2 section of Khan Academy, I have a college algebra textbook to continue my algebra studies.

Oct 15, 2021 · Khan Academy's linear algebra course is meant to be a helpful resource for linear algebra students, so it covers all the same topics that one would find in a college LA course. Reply reply RayanFarhat

Feb 26, 2022 · I think using Khan Academy with a textbook is always great. Learning to read textbooks alone is a really difficult skill to get used to. Having something explained verbally while also being able to follow along with the textbook helps a lot. Khan Academy also doesn't provide many practice problems, while a textbook does.

Jul 18, 2020 · The Khan academy course is okay, but it's the bare bones computational section of a LA course. You're not gonna be learning about important theorems or special matrices/properties of matrices (which are important!

Jan 10, 2020 · Khan Academy's linear algebra series helped me to understand the basics, but I ended up having to look for other sources. One example is that Sal Khan doesn't do any examples involving polynomial-vectors.

Hoffman and Kunze's book or Peter Lax's Linear Algebra and it's Applications are both good second viewings of the subject for pure or applied math respectively. All vector calculus books are equally as lackluster imo except Linear Algebra, Vector Calculus, and Differential Forms by Hubbard and Hubbard.

Jun 27, 2022 · No really, MIT linear algebra taught by professor Strang and also the other one about matrix method are entry point But I would recommend completing calculus and linear algebra on Khan before starting the MIT course

I also love the OpenStax textbook. I wanted to skip early maths like College Algebra so I used it to learn all about trig, vectors etc as you mention. I also used Khan Academy. I feel like Khan Academy does a great job of teaching while OpenStax does a great job of fully studying the concepts. Powerful duo that is