Jawabanmu

2014-06-11T20:48:52+07:00
R = 10
α = 240°

x = R cos α
x = (10)(- \frac{1}{2} )
x = -5

y = R sin α
y = (10)(- \frac{1}{2}  \sqrt{3} )
y = -5 \sqrt{3}

jadi koordinat cartesian (-5,-5 \sqrt{5}

CMIIW :3