sen 120 = sen 60 = [tex] \frac{\sqrt{3} }{2} [/tex]
cos 135 = - cos 45 = [tex]- \frac{\sqrt{2} }{2} [/tex]
cos 120 = - cos 60 = [tex] -\frac{1}{2} [/tex]
sen 120 - cos 135 + cos 120
= [tex] \frac{\sqrt{3} }{2} + \frac{\sqrt{2} }{2} - \frac{1}{2} = \frac{\sqrt{3}+\sqrt{2}-1 }{2} [/tex] RESULTADO FINAL
