Not sure how to solve this one

Answer:
[tex]x\approx 63.4^0[/tex]
Step-by-step explanation:
In the given right triangle,
Measure of angle = x°
Opposite side of the angle = 12 units
Adjacent side of the angle = 6 units
By taking tangent ratio of the given angle,
tan(x°) = [tex]\frac{\text{Opposite side}}{\text{Adjacent side}}[/tex]
= [tex]\frac{12}{6}[/tex]
= 2
[tex]x^0=\text{tan}^{-1}(2)}[/tex]
[tex]x=63.43^0[/tex]
[tex]x\approx 63.4^0[/tex]