Question

sen120-cos135+cos120

Answer 1

La solución es: 
0'866025403 - (-0'707106781) + (-0'5) = 1'073132185

Answer 2

sen 120 = sen 60 = $\frac{\sqrt{3} }{2}$
cos 135 = - cos 45 = $- \frac{\sqrt{2} }{2}$ 
cos 120 = - cos 60 = $-\frac{1}{2}$

sen 120 - cos 135 + cos 120
= $\frac{\sqrt{3} }{2} + \frac{\sqrt{2} }{2} - \frac{1}{2} = \frac{\sqrt{3}+\sqrt{2}-1 }{2}$   RESULTADO FINAL