Resposta :
cosx = [tex] \frac{Cateto Adjacente}{Hipotenusa} [/tex]
cos[tex] \alpha [/tex] = [tex] \frac{ \sqrt{3} }{2} [/tex]
cos30° = [tex] \frac{ \sqrt{3} }{2} [/tex]
cos[tex] \alpha [/tex] = cos30°
[tex] \alpha [/tex] = 30°
cos[tex] \alpha [/tex] = [tex] \frac{ \sqrt{3} }{2} [/tex]
cos30° = [tex] \frac{ \sqrt{3} }{2} [/tex]
cos[tex] \alpha [/tex] = cos30°
[tex] \alpha [/tex] = 30°