Respuesta :

[tex]\cos x=\frac{\text{adjacent}}{\text{hypotenuse}}[/tex][tex]\cos x=\frac{\sqrt[]{2}}{2}[/tex]

Therefore,

[tex]\begin{gathered} \cos 45=\frac{1}{\sqrt[]{2}} \\ \cos 45=\frac{1}{\sqrt[]{2}}\times\frac{\sqrt[]{2}}{\sqrt[]{2}}=\frac{\sqrt[]{2}}{2} \end{gathered}[/tex]

The answer is x = 45 degree's