This is a book about conservation’s Biology of Peru, a country with a lot of diversity in flora and fauna. In the book, there were classificated amphibians, birds, insects, mammals and reptiles; this summary is about the most important animals that you can find there.

The byzantine empire was one of the most important empires during the median ages. It was the continuation of Rome although it does not look like it because of its Christian culture, art and society. Constantine, a Roman emperor; moved the capital from Rome to Constantinople because the Eastern part was becoming christians and he did it too, so he choose that ubication and he centered more in that side. Theodosius I, another Roman emperor, divided the territory in two sides because the land was too great to moderate; he took with his son the eastern side; Byzantium. His other son kept ruling the western one.

It is really simple in the theory but in practice, it can be complicated. We have to add corresponding points on the graph and then, unite them. We can graph Sin, Cos an Tan to the same way than their reciprocals; Cosecant, Secant and Cotangent.

How to find the angle that we applied a function to get our answer? That is the purpose of Trigonometric equations. We will learn to use reverse Sine, Cosine and Tangent for getting the angle that we want to find. We will solve for X in a trigonometric function, also if it has a coefficient at its side; where we have to rotate the angle it according to its number.