A subject you enjoyed studying

My favorite subject of this semester is calculus which is the logical mathematical thought in which a lot of areas of maths come together in a subject. Sometimes this subject is so dense and very complicated of  understand for me, but this is what makes it so interesting.

I enjoy this subject for many things, one of them are trigonometric functions, sin and cos, and the other known functions. Another thing is what I like numbers in special the set reals.

I learned a lot of things, but my favorite thing learned are derivatives, what are the slope of the tangent line, also I learned the formal definition of a limit and when a limit can exist.

I thought that this subject will be easy for me, because I like the numbers and in the school I had good marks and always understood the contents of the asignature, but to the I have class of calculus in the university, I can understand that this subject not is same that in the school.