Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles. The Greeks focused on the calculation of chords, while mathematicians in India created the earliest-known tables of values for trigonometric ratios such as sine.

Trigonometry has been applied in areas such as geodesy, surveying, celestial mechanics, and navigation.

Trigonometry is known for its many identities. These trigonometric identities are commonly used for rewriting trigonometrical expressions with the aim to simplify an expression, to find a more useful form of an expression, or to solve an equation.

Trigonometry, the branch of mathematics concerned with specific functions of angles and their application to calculations. There are six functions of an angle commonly used in trigonometry. Their names and abbreviations are sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (cosec).

This is useful for all 10th, 11th, and 12th students also those who are from BSc Mathematics. 

In this, we will go with derivation for formulae as well some numerical that helps to understand in class. 

Some highlights give below. you can ask live questions as well. 

Radians: Trigonometric functions
The Pythagorean identity: Trigonometric functions
Trigonometric values of special angles: Trigonometric functions
Graphs of sin(x), cos(x), and tan(x)