Respuesta :

Panoyin
[tex]cos(2x) = \frac{1}{\sqrt{2}}[/tex]
[tex]cos(2x) = \frac{1}{\sqrt{2}} * \frac{\sqrt{2}}{\sqrt{2}}[/tex]
[tex]cos(2x) = \frac{\sqrt{2}}{2}[/tex]
[tex]cos(2x) = cos(45)[/tex]
[tex]cos(x) = cos(22.5)[/tex]
[tex]x = 22.5[/tex]

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