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高一年级1 .设ｘ ,ｙ为实数 ,且满足 (ｘ - 1 ) 3 + 2 0 0 3 (ｘ - 1 ) + 1 =0 ,(ｙ- 1 ) 3 + 2 0 0 3 (ｙ- 1 ) - 1 =0 .求ｘ + ｙ的值 .2 .已知锐角α ,β满足 ｓｉｎαｃｏｓβ2 0 0 2 + ｓｉｎβｃｏｓα2 0 0 2 =2 .求ｓｉｎ2 0 0 2 (α + β)的值 .3 .过正方形ＡＢＣＤ的
High grade 1. Set x and y as real numbers and satisfy (x - 1) 3 + 2 0 0 3 (x - 1) + 1 =0, (y - 1) 3 + 2 0 0 3 (y - 1 ) - 1 =0. Find the value of x + y. 2. Known acute angle α, β satisfies sinαcosβ2 0 0 2 + sinβcosα2 0 0 2 =2. Find the value of sin2 0 0 2 (α + β).3. Square ABCD