I think this is a great lecture for building a solid foundation in mathematics. I will also work hard on my college mathematics. Thank you.

Please make the engineering math lectures easy like this one.

I understand how angles in trigonometric functions are represented as positive and negative values now.

I gave up on math in high school, and just took statistics classes in college. I ended up getting a master's degree in computer science, and I'm reviewing middle and high school math to study linear algebra. Thank you for making this lecture so that I can recap through basic lectures like this.