**MATHMAA**

In this Introduction-To-Trigonometry first we will explore the meaning and history of 'Trigonometry'. We also come to know what we cover under this topic introduction-to-trigonometry.

Come! Let Us Explore About Trigonometry!

The word 'trigonometry' is derived from the Greek words 'tri' - meaning three, 'gon' - meaning sides and 'metron' - meaning measure.In fact trigonometry is the study of relationships between the sides and angles of a triangle. The earliest known work on trigonometry was recorded in Egypt and Babylon. Early astronomers used it to find out the distances of the stars and planets from Earth. Even today, most of the technological advanced methods used in Engineering and Physical Sciences are based on trigonometrical concepts.

In this topic, we will go through some ratios of the sides of a right triangle was respect to its acute angle, called trigonometric ratios of the angle, trigonometric identities.

**Worksheets **

2. Worksheet - 2

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4. Worksheet - 4

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