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设f(x)=sinxcosx﹣cos2(x+). (Ⅰ)求f(x)的单调区间; (Ⅱ)在锐角△ABC中,角A,B,C的对边分别为a,b,c,若f()=0,a=1,求△ABC面积的最大值.
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高一下学期数学《》真题及答案
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