In a right-angled triangle, trigonometric ratios relate angles and sides. The primary ratios are sine (sin), cosine (cos), and tangent (tan).

Explanation: Trigonometric ratios are mathematical relationships that exist between the angles and sides of a right-angled triangle.

These ratios express the connections between the lengths of specific sides and the measures of particular angles in the triangle.

Simply put, trigonometric ratios are a set of rules that relate the angles and sides of a right-angled triangle to each other.