Answer: 10.2 (nearest tenth)
Explanation:
For this question, you have to find out whether you are using Sin, Cos, or Tan.
For that, you can use SOH CAH TOA to help you.
SOH-the 'S' is for Sin then the 'O' and the 'H' stands for Opposite over Hypotenuse.
CAH-the 'C' is for Cos and the 'A' and the 'H' is for Adjacent over Hypotenuse.
TOA-the 'T' is for Tan then then 'O' and the 'A' is for Opposite over Adjacent.
Because you have the Adjacent (the side next to the 22°) and the Hypotenuse (the side opposite the right angle) you would be using Cos.
First you would write:
Cos 22=x/11
Then because you want x on it's own you would do the inverse so you would times Cos 22 by 11.
This would be written as:
11 Cos 22=x
So, x=10.2 (nearest tenth)
Hope this helps :)