Question

Look at the triangle:

Answer 1

What is the value of cos x°?

8 ÷ 17
17 ÷ 8
15 ÷ 17
8 ÷ 15

Answer 2

@mathstudent55

Answer 3

Use SOHCAHTOA.
First, you are asked specifically about cosine.
Which sides do you need for cosine?

Answer 4

Adjacent and Hypotonuse

Answer 5

So we would do something with the numbers 17 and 15

Answer 6

Correct.
For angle x, which sides are the adjacent leg and the hypotenuse?

Answer 7

hypotonuse is 17 making 15 opposite and 8 adjacent

Answer 8

Actually no, the other way around

Answer 9

Better.
Remember, adjacent and opposite are based on the angle you are using.
In this problem you are using angle x.
For angle x, adjacent is next to it, so it's 15.
Opposite is across from angle x, so it's 8.

Answer 10

Yep!

Answer 11

Now just write the numbers in the fraction in the proper places.