Answer:
8
Step-by-step explanation:
sin 30° = 1/2
sin is opponent/hypotenuse
so
opp/hyp = 4/x = 1/2
x = 4 * 2 = 8
[tex]\displaystyle x=8[/tex]
[tex]\displaystyle x=\frac{sin(90) \times 4 }{sin(30)}[/tex]
