Learn about three trigonometric ratios in similar right-angled triangles with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

Revising the trigonometric laws and identities, covered in Class 10 and 11, ... Algebra: Some of the questions, especially the ones requiring proofs, are based on trigonometric ratios.

The second chapter deals with trigonometrical ratios, ... and constitutes an introduction to the theory of functions as illustrated by trigonometrical ratios. The Elements of Plane Trigonometry ...

Trigonometric Ratios-These ratios are the foundation of the trigonometry and you must understand them in a very conceptual way. There are 6 ratios in trigonometry namely- sin, cos, tan, cot, sec ...