Question

Anybody know what the answer is?

Answer 1

Side b is adjacent to the 30° angle so use cosine to solve. (soh cah toa)

cos(30°) = b/12

12*cos(30°) = b

cos(30°) is √(3)/2

12*(√(3)/2 ) = b

6√(3) = b

3 goes in the box