Answer: Third option.
Explanation:
Given the right triangle in the figure attached, you know that, for the known angle of 62 degrees, the lenght of the opposite side is 18 and the hypotenuse is "x"
Therefore, you need to remember the following identity:
Then, having that:
You need to substitute these values into
, then you get that the correct trigonometry formula to use to solve for "x" is: