Răspuns:
[tex] \frac{ \sqrt{2} }{ \sqrt{3} } \times \sin(60) + 0.5 \times \cos(45) = \\ \frac{ \sqrt{2} }{ \sqrt{3} } \times \frac{ \sqrt{3} }{2} + \frac{1}{2} \times \frac{ \sqrt{2} }{2} = \\ \sqrt{2 \times \frac{1}{2} } + \frac{ \sqrt{2} }{4} \\ \frac{ \sqrt{2} }{2} + \frac{ \sqrt{2} }{4} = \\ \frac{2 \sqrt{2} }{4} + \frac{ \sqrt{2} }{4} = \\ \frac{3 \sqrt{2} }{4} [/tex]
Sper ca te-am ajutat :)
