As we can see by the 60 degree mark at angle C, we know this is a 30-60-90 triangle. I have attached an image of the relationship for a 30-60-90 triangle.
Using the example of y = 1, we can see that x the other leg of the triangle would be y[tex]\sqrt{3}[/tex].
So, x is equal to y[tex]\sqrt{3}[/tex], which we got from using the relationship shown in the attached image. The correct answer is the fourth option.
Hope this helps! :)
