Question

What is cos K? (Applying Trigonometric Functions)

Answer 1

Answer: Last option.

Explanation:

You must apply
`cos\alpha=(adjacent)/(hypotenuse)`

Then, given the right triangle shown in the image attached and the angle K, the adjacent side and the hypotenuse of the triangle are the following:

`adjacent=5\\hypotenuse=13`

Therefore, when you substitute values into
`cos\alpha=(adjacent)/(hypotenuse)` you obtain that cosK is the shown below:

`cosK=(5)/(13)`

Therefore, the answer is the last option.

Answer 2

The correct answer is last option

Cos K = 5/13

Explanation:

Trigonometric ratio

Cosθ = Opposite side/Hypotenuse

From the figure we can see a right angled triangle KLM

Right angled at L and KM is the hypotenuse

To find the value of Cos K

Cosθ = Opposite side/Hypotenuse

= KL/KM = 5/13

Therefore the correct answer is last option

Cos k = 5/13