Question

find: \\( \cos b \\)
the figure is not drawn to scale

Explanation:

Step1: Recall the cosine formula

In a right - triangle, $\cos\theta=\frac{\text{adjacent}}{\text{hypotenuse}}$.

Step2: Identify the adjacent side and hypotenuse for angle \(B\)

For angle \(B\), the adjacent side is \(4\) and the hypotenuse is \(5\).
So, $\cos B=\frac{4}{5}$

Answer:

$\frac{4}{5}$