Question:
Solution:
Remember the following definition :
[tex]\cos (x)=\frac{adjacent\text{ side to the angle x }}{hypotenuse}[/tex]
thus, if:
[tex]\cos (x)=\frac{adjacent\text{ side to the angle x }}{hypotenuse}=\frac{\sqrt[]{3}}{2}[/tex]
then, according to the given triangles in the problem, the only angle that fulfills this, is:
[tex]x=30[/tex]
so that, the correct answer is:
[tex]x=30[/tex]
