## Geometry: Common Core (15th Edition)

sin A = $\frac{5}{6.4}$ cos A = $\frac{4}{6.4}$ tan A = $\frac{5}{4}$ sin B = $\frac{4}{6.4}$ cos B = $\frac{5}{6.4}$ tan B = $\frac{4}{5}$
The ratio for sine is: sin θ = $\frac{opposite}{hypotenuse}$ The ratio for cosine is: cos θ = $\frac{adjacent}{hypotenuse}$ The ratio for tangent is: tan θ = $\frac{opposite}{adjacent}$ Let's find these ratios for both $\angle A$ and $\angle B$: sin A = $\frac{5}{6.4}$ cos A = $\frac{4}{6.4}$ tan A = $\frac{5}{4}$ sin B = $\frac{4}{6.4}$ cos B = $\frac{5}{6.4}$ tan B = $\frac{4}{5}$