Question

In ABC, what is the value of cos B?

Answer 1

Hey and thanks for giving me the chance to serve u_______________________________________

it is c
hope this helped

Answer 2

Answer: The correct option is

(B)
`(12)/(13).`

Step-by-step explanation: We are given to find the value of cos B in the right-angled triangle ABC shown.

From the figure, we can see that

AB = 12 units, BC = 13 units and AC = 5 units.

For the acute angle B, we have

base, b = AB = 12 units

and

hypotenuse, h = BC = 13 units.

Therefore, we get

`\cos \angle B=(base)/(perpendicular)\\\\\\\Rightarrow \cos \angle B=(AB)/(BC)\\\\\\\Rightarrow \cos \angle B=(12)/(13).`

Thus, option (B) is correct.