Jawabanmu

2014-04-10T13:31:34+07:00
(2,120°)
X = a . cos(180°-60°)
X = 2. -cos60°
X = 2. -1/2
X = -1

Y = a. sin(180°-60°)
Y = 2. sin60°
Y = 2.  \sqrt{3/2}
Y =  \sqrt{3}

X = ( -1 ,  \sqrt{3}
jawaban : B
1 5 1