Polar Coordinate System 

David Ngonga, Excellent! The world needs you. You might also like my new website: www.universityphysics.education Cheers, Dr. A

Hammad, Excellent, great to hear. Thanks for the comment, and keep up with the physics! You might also like my new website: www.universityphysics.education Cheers, Dr. A

Excellent. Cheers, Dr. A

NabihaVahaj X-C 37, You're very welcome. Glad you're enjoying the videos. You might also like my new site: www.universityphysics.education Cheers, Dr. A

I like that idea. Working on filling in gaps where I can, including going to extremes with very difficult problems. Stay tuned. Cheers, Dr. A

Im here as I am trying to beef up my math knowledge for game programming. Very good explanations.

Sure. Give me a little time and I'll try to get those posted. Cheers, Dr. A

😃😃😃 okay sir...

Thank you. Cheers, Dr. A

i realize it's kinda randomly asking but does anybody know a good website to watch new series online?

@Soren Erik Lately I have been using Flixzone. Just search on google for it :)

+T CR Thanks T! Check out the technology here: learningglasssolutions.com Cheers, Dr. A

Md Sifat, You're very welcome. Glad you're enjoying the videos. You might also like my new site: www.universityphysics.education Cheers, Dr. A

@@yoprofmatt thanks..

Your calculator should have a "cos" button. If you push "2nd" then push the "cos" button, that does the inverse cos operation cos^-1. Hope that helps. Cheers, Dr. A

Thank you. Cheers, Dr. A

Ironman Chandrangshu, I am here. What's up? Cheers, Dr. A

@@yoprofmatt I am fine

These classes are intuitive, which is missing in most classes. Calculations of all numbers on cosine or sine or any other humungous numbers is good only for exams. In real life, these are already automated and easily available to calculate and use them for real life applications. His classes are conceptual and reminds why we are studying this. Best for scientists or research enthusiasts