Question

1. cos a

find the value of cosa (simplified)
5/3
3/5
4/5
3/4

Explanation:

Step1: Recall cosine definition

In right triangle, $\cos A = \frac{\text{adjacent to } A}{\text{hypotenuse}}$

Step2: Identify sides for angle A

Adjacent side: AB = 30; Hypotenuse: AC = 50

Step3: Calculate cos A

$\cos A = \frac{30}{50} = \frac{3}{5}$

Answer:

B. 3/5