Answer:
Cosine
Step-by-step explanation:
Cosine = [tex]\frac{adjacent}{hypothenuse}[/tex]
Cos 70 = [tex]\frac{x}{8}[/tex]
0.633 = [tex]\frac{x}{8}[/tex]
0.633 x 8 = [tex]\frac{x}{8}[/tex] x 8
5.064 = x