##### Introduction to Trignometry – Notes

**Trigonometric Ratios and Angles **

Trigonometry is the study of relationship between the angles and sides of triangles.

The ratios between the lengths of the sides of a right-angled triangle are relation with its acute angles is called trigonometric ratios.

N a right-angled triangle *ABC, *if Ð*A* is an acute angle:

- Sin Ð
*A* - Cos
- Tan Ð
*A* - Cosec Ð
*A* - Sec Ð
*A* - Cot Ð
*A*

If we know the value of any one of the trigonometric ratios of an acute angle in a right-angled triangle, we can calculate other trigonometric ratios of the angle.

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CBSE Class 10th Maths 8 - Introduction to Trignometry - Notes

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