Jawabanmu

2014-04-24T17:36:18+07:00
Limit x menuju 0 ngak usah ditulis lagi ya biar cepat
= 2x²/(1 - cos²(1/2)x
= 2x²/sin²(1/2)x
= 2/(1/2)²
= 2/(1/4)
= 8