Help please I don’t understand please ASAP

Answer:
Step-by-step explanation:
another isosceles
SOH CAH TOA
Cos(x)=Adj/ Hyp
Hyp*Cos(x) = Adj
30* Cos(45) = Adj
30* [tex]\sqrt{2}/2[/tex] = Adj
15*[tex]\sqrt{2}[/tex] = Adj ( both legs are the same )