Jawabanmu

2014-01-04T19:58:14+07:00
(sin α - cos α)² = (2p)²
sin²α -2 sinαcosα +cos²α = 4p²
sin²α + coss²α - 4p² = 2 sinαcosα
1 - 4p² = sin2α
jadi sin2α = 1 - 4p²