What good with it mayne! Please help yo boy out with the dis math question?

Answer:
1.9
Step-by-step explanation:
Use triginometry to find the side length. So cosθ=[tex]\frac{?}{2}[/tex]. Rearrange the equation so it looks like 2cosθ=?. We are given θ (20 degrees) so 2cos(20degrees)=?.