172 страниц. 2013 год. LAP Lambert Academic Publishing Trigonometry is very crucial in different Natural Science fields. But most students are not understand that it is a function and they fail to manipulate algebrically with it. This book lays basic concept in understanding and working with trigonometry by identifying some of common mistakes and difficulties of students at high school level. It also indicates how to use this function in different fields and shows how to calculate some values of the function for some special angles easily.