Whose correct & whats an equation to solve for x.

Answer:
Step-by-step explanation:
x is the side opposite the angle of 12 degrees
we know the hypotenus is 20 ft
we don't know what the side length that is adjacent to the angle
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ADJ/HYP = cos (of the angle)
OPP/HYP = sin (of the angle)
sin/cos = tan (of the angle) = ( OPP/HYP) / (ADJ/HYP) = OPP/ ADJ
How would we solve for x the side opposite the angle?
So who is right?