**Taming The Infinite/**

__Chapter 5/ Eternal Triangles: Trigonometry and logarithms.__I see mathematics, as much as anything else, as an evolution that has grown and morphed throughout the centuries. Chapter 5 speaks more of trigonometry and trigonometric functions, logarithms, Ptolemy and such. I could be wrong, but to me this is the step out of the 2 dimensional world, were geometric functions transform into a 3 dimensional world of probabilities, here Ptolemy rises out to speak of planetary movement and nature. Allegedly, he proposed a model that was highly spoken of and followed, which premise stood as the earth being a center upon which the sun moved around; of course this was later proven wrong, were the sun is actually the center upon which the earth revolves around. However, the spiking interest here is the fact that Ptolemy did indeed create a working modeled that proved otherwise, and how many people followed and convincingly believed in such theory, that was later negated by the works of future authors. I have yet to understand the complete nature of this process, or the complete nature of trigonometric functions for that matter, but this chapter proposes a decent start, such as the book does with the rest of mathematical matters. The mention upon Astronomy, one of the seven coined liberal arts, exists also on this chapter and being myself a follower of the liberal arts, this subject is of a particular interest of mine. Math not being my forte as long as I can remember, causes an inevitable prejudice to all the numbers and formulas that appear on the text, but I will not, in fact I refuse to, disregard every proposed idea on this book, eventually I will fully understand them, or so I hope to, but for now there isn't much I can say of logarithms and trigonometry other than it follows from geometry, especially out of the works of Euclid.