Properties of Complex numbers and Simple Integration over R

This is a 2nd edition of the book. Generally, the book shows how basic complex analysis can greatly affect finding primitives for trigonometric functions. The text from the 1st edition has been updated for better understanding.In particular, presents the geometrical properties of homographic functions and some applications of complex theory to the integration of trigonometric functions. It also presents a theoretical background of homographic functions and a few solved problems.