Ratios in Right Triangles

Explanation

Trigonometric ratios are based on right triangles.

Three main ratios:

1. Sine (sin) = opposite / hypotenuse

2. Cosine (cos) = adjacent / hypotenuse

3. Tangent (tan) = opposite / adjacent

These ratios relate angles to side lengths.

Example: Triangle with angle θ, opposite = 3, adjacent = 4, hypotenuse = 5

• sin θ = 3/5

• cos θ = 4/5

• tan θ = 3/4