Answer:
63.4
Step-by-step explanation:
x° is an acute angle in a right triangle with the opposite and adjacent sides given. That means the relevant trig relation is ...
Tan = Opposite/Adjacent
tan(x°) = 18/9 = 2
The value of the angle is found using the inverse tangent function:
x° = arctan(2) ≈ 63.4°
x = 63.4 . . . . . . . rounded to tenths
