# Trigonometry

Learn trigonometry from basics to advanced level for beginners and advanced learners.

## Introduction

The word Trigonometry was derived from two Green words “Trigonon” and “Metron”, and the meanings of them are “Triangle” and “Measure” respectively. Therefore, the meaning of trigonometry is measuring a triangle. A triangle contains angles and sides basically. So, measuring angles, sides and investigating relation between them is called Trigonometry.

### Basics

Basic knowledge on angle and right angled triangle is required to start learning trigonometry.

### Functions

There are six functions in trigonometry and each trigonometric function is defined on the basis of ratio between any two sides of the triangle. Hence, every function is also called as trigonometric ratio simply.

### Identities

List of all formulas, used in trigonometry.

#### Problems

Test your skill by solving our trigonometric problems for beginners and advanced learners.