Introduction of Trigonometry

Intro: Trigonometry is a branch of mathematics that studies triangles and the relationships between their sides and the angles between these sides. The field evolved during the third century BC as a branch of geometry used extensively for astronomical studies. It is also the foundation of the practical art of surveying. Trigonometry basics are often taught in school either as a separate course or as part of a precalculus course. Fields that use trigonometry or trigonometric functions include Biology, Pharmacy, Chemistry, many Physical Sciences (Physics, Mechanics and Astronomy could have been developed without Trigonometry), Electrical Engineering, Mechanical Engineering, Civil Engineering, Architecture, Analysis on Financial Markets and electronics. In this project you'll find out on how Angle of Depression and Angle of Elevation are measured. You'll get some ideas about Sum and Difference Identities. I hope this could be a good reference of those topic mention and my their eyes be fed with satisfaction with the information.

Acknowledgement In my field, IT (Information Technology) internet is a great source of reference in my homeworks, researches and projects; it helped me accomplish this project with the help of technology my works are more representable to read and more efficient-looking. I may want to recognized my Inspiration, in giving me some ideas and putting up the datas together to make this project well-done.

Objectives
· Knowing the Defintion of Angle of Depression,
· Computing the measure of distance and height by applying the Angle of Depression,
· Knowing the Definition of Angle of Elevation,
· Computing the measure of distance and height by applying the Angle of Elevation,
· Defining the Sum Identities
· Explanation and learning to compute the Sum Identities.
· Defining the Difference Identites, and
· Explanation and learning to compute the Difference Identities

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