Trigonometry

Trigonometry is a scientific mathematical concept which reveals relationship between sides of a triangle and its angle. This math concept is actually used to measure heights, distances and areas and became essential in engineering and physics.

The word Trigonometry is derived from two Greek words. One word is Trigonon and the second word is Metron. The meaning of trigonon and metron are triangle and measure respectively. Hence the meaning of trigonometry is measuring triangle.

Trigonometry was developed with angle of a right angle triangle and six functions which are known Trigonometric functions or ratios.

1. Sine
2. Cosine
3. Tangent
4. Co-Tangent
5. Secant
6. Cosecant

The six trigonometric ratios are abbreviated as Sin, Cos, Tan, Cot, Sec and Cosec but depend on angle of a triangle. Expressing trigonometric functions like Sin, Cos, Tan, Cot, Sec and Cosec are meaningless. Hence we consider an angle (Theta (θ) ) and the ratios can be written Sin θ, Cos θ, Tan θ, Cot θ, Sec θ and Cosec θ.