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1、,数学 A（理）,45分钟阶段测试(五),第四章 三角函数、解三角形,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,答案 B,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,答案 D,2,4,5,6,7,8,9,10,1,3,B,2,3,5,6,7,8,9,10,1,4,C,2,3,4,6,7,8,9,10,1,5,2,3,4,6,7,8,9,10,1,5,2,3,4,6,7,8,9,10,1,5,答案 A,2,3,4,5,7,8,9,10,1,6,2,3,4,5,7,8,9,1
2、0,1,6,答案 0,2,3,4,5,6,8,9,10,1,7,2,3,4,5,6,8,9,10,1,7,2,3,4,5,6,9,10,1,7,8,8.下列命题中正确的是 .(写出所有正确命题的序号) 存在满足sin cos ； ycos( 3x)是奇函数； y4sin(2x )的一个对称中心是( ，0)； ysin(2x )的图象可由ysin 2x的图象向右平移 个单位得到.,2,3,4,5,6,9,10,1,7,8,答案 ,2,3,4,5,6,7,8,10,1,9,2,3,4,5,6,7,8,10,1,9,2,3,4,5,6,7,8,10,1,9,2,3,4,5,6,7,8,9,1,10,2,3,4,5,6,7,8,9,1,10,2,3,4,5,6,7,8,9,1,10,2,3,4,5,6,7,8,9,1,10,
