Jawabanmu

2014-05-04T17:37:30+07:00
F(x) = (4x - 5)³Sin²x
f'(x) = 3(4)(4x-5)²Sin²x + (4x-5)³(2Sinxcosx)
       = 12(4x-5)²Sin²x +(4x-5)Sin2x atau
       = (4x-5){12(4x-5)Sin²x + Sin2x}
       = (4x-5)((48x - 60)Sin²x + Sin2x)