I found the book explanations for this so hard, and one video from you had me just doing it in my head. Thank you so much for making my college course achievable! I don't know what I'd do without these videos to fill in all of my basics!
As a field surveyor I deal with this math every day and the thumbnail had me scratching my head thinking there was some fine detail I was missing. You got me to watch the video to make sure I wasn't wrong.
