左边
=[sin2t - squr3/2·cos2t+sin2t/2]^2
=[3/2·sin2t-squr3/2·cos2t]^2
=[squr3·(squr3/2·sin2t-cos2t/2)]^2
=3·[squr3/2·sin2t-cos2t/2]^2
=3·[sin(2t-∏/6)]^2
左边
=[sin2t - squr3/2·cos2t+sin2t/2]^2
=[3/2·sin2t-squr3/2·cos2t]^2
=[squr3·(squr3/2·sin2t-cos2t/2)]^2
=3·[squr3/2·sin2t-cos2t/2]^2
=3·[sin(2t-∏/6)]^2