Question

what is cos a? cos a = \frac{?sqrt{}}{ }

Explanation:

Step1: Recall cosine formula in right - triangle

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

Step2: Identify adjacent and hypotenuse

The side adjacent to angle $A$ is $4\sqrt{6}$, and the hypotenuse is $25$.

Answer:

$\frac{4\sqrt{6}}{25}$