Hello!
We are given the opposite length, 9, along with the adjacent length y. The tangent is what deals with the opposite and adjacent sides. Let's find the tangent of 30.
tan30≈0.58
This gives us the equation below.
0.58=9/y
We multiply both sides by y.
0.58y=9
We divide both sides by 0.58.
y≈15.52
I hope this helps!
