There have been several reasons why I haven't posted: being on vacation, getting ready for school, trying to figure out how to display math symbols on my blog, and most importantly, recalling some trigonometry that I have forgotten. After working on some problems from Durell and Robson's Advanced Trigonometry,
I went through my math handbooks and realized that I better be familiar with the Law of Tangents, Mollweide's formulas, Newton's formulas, and Heron's formula, before I went any further. I will prove these formulas in my next post.