# Trignometric Functions

### Trignometric Functions

**Trigonometry** (from Greek *trig?non*, "triangle" + *metron*, "measure"^{}) is a branch of mathematics that studies relationships involving lengths and angles of triangles. The field emerged during the 3rd century BC from applications of geometry to astronomical studies.^{ }

In mathematics, **trigonometric identities** are equalities that involve trigonometric functions and are true for every single value of the occurring variables. Geometrically, these are identities involving certain functions of one or more angles. They are distinct from triangle identities, which are identities involving both angles and side lengths of a triangle. Only the former are covered in this article.

Don't ever take the stress of remembering the trigonometric ratios. Infact they are very easy and one can compare with the practical examples you see daily.For example to construct a tower or a house you need to comparing the angles and calculate the safe angles

Ok now you may ask me how? Come i will proceed you to the practical example

Facts & Practical applications of Trigonometry

Well now you will get an idea of how we use the subject we go trough now in the future

Make Ur self and read the PDF given below

Trigonomertry deals with right angled triangle and its properties to explain the trigonometric properties.This video gives the detailed explanation of the trigonometric ratios and their derivation