Răspuns:
[tex] \sin(30) = \frac{1}{2} [/tex]
[tex] \cos(45) = \frac{ \sqrt{2} }{2} [/tex]
[tex] \sin(60) = \frac{ \sqrt{3} }{2} [/tex]
Ecuatia devine:
[tex] \frac{1}{2} - \frac{ \sqrt{2} }{2} + \frac{ \sqrt{3} }{2} = \frac{1 - \sqrt{2} + \sqrt{3} }{2} [/tex]
