Jawabanmu

2014-05-17T23:27:34+07:00
5.E

essay

1.
2sinA+4cosB
=2sin150+ 4cos240
=2.sin(180-30)-4.(cos180+60)
=2.sin 30-4.cos 60
=2.1/2-4.1/2
=1-2=-1