Jawabanmu

2014-03-29T21:59:24+07:00
Sin360=0....cos 120= -sin30=-1/2...tan225=tan45=1....jadi 0-1/2+1=1/2
2014-03-29T22:37:57+07:00
-sin 360 = -sin (270 + 90) = cos 90 = 0
cos 120 = cos (90 + 30) = -sin 30 = - 1/2
tan 225 = tan (270 - 45) = cot 45 =      1      = 1/1 = 1
                                                     tan 45

 -sin 360 + cos 120 + tan 225 = 0 + (-1/2) + 1 = 1/2 = 0,5