Answer:
x = 30º
Explanation:
This answer requires trigonometry, specifically, the cosine function. This is because we are given the length of the side adjacent to x and the length of the hypotenuse.
If you recall:

Therefore,

Now, we must use the inverse cosine function on a calculator to figure out the value of x.

Now, we must round it to the nearest whole number, so x = 30º.