Answer:
Explanation:
We are given two sides, the adjacent and the opposite, and the angle of 60*
Using this information, we can refer to the acronym:
SOH CAH TOA

For this question, we will be using the Tangent equation
Tan(60*) = 12/x
Using a calculator, Tan (60*) = sqrt 3
Then cross-multiply


Therefore the answer is: x = 4
