Răspuns:
[tex] \sqrt{3} \times \cos(30) + \frac{1}{2} \cos(90) = 2 [/tex]
[tex] \sqrt{3} \times \frac{ \sqrt{3} }{2} + \frac{1}{2} \times 0 = 2[/tex]
[tex] \frac{3}{2} + 0 = 2[/tex]
[tex] \frac{3}{2} = 2[/tex]
[tex]1.5 = 2 \: fals[/tex]
Sper ca te-am ajutat :)
