Question

What is the value of cos A?

Answer 1

Answer:

Cos A = 3/5

Step-by-step explanation:

Points to remember

Trigonometric ratios

Sin θ  = Opposite side/Hypotenuse

Cos θ = Adjacent side/Hypotenuse

Tan θ = Opposite side/Adjacent side

From the figure we can see a right angled triangle, ABC

AC = 9, CB = 12 and AB = 15

To find the value of Cos A

Cos A = Adjacent side/Hypotenuse

 = AC/AB

 = 9/15  = 3/5

Therefore the value of Cos A = 3/5

Answer 2

Answer:

3/5

Step-by-step explanation:

cos A = $\frac{AC}{AB}$=$\frac{9}{15}$=$\frac{3}{5}$