Respuesta :

[tex]\\ \sf\longmapsto cos31=\dfrac{12}{x}[/tex]

[tex]\\ \sf\longmapsto 0.85=\dfrac{12}{x}[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{12}{0.85}[/tex]

[tex]\\ \sf\longmapsto x=14.11[/tex]

HayabusaBrainly

>> Answer

________

[tex] \: [/tex]

cos (31°) = 12/x

0.85 = 12/x

x = 12/0.85

x ≈ 14.1