如图,在直角坐标系xOy中,锐角△ABC内接于圆x
2+y
2=1.已知BC平行于x轴,AB所在直线方程为y=kx+m(k>0),记角A,B,C所对的边分别是a,b,c.
(1)若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100906645220831/SYS201311031009066452208015_ST/0.png)
的值;
(2)若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100906645220831/SYS201311031009066452208015_ST/1.png)
的值.
考点分析:
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的值域为集合A,关于x的不等式
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的解集为B,集合
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,集合D={x|m+1≤x<2m-1}(m>0)
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(2)若D⊆C,求实数m的取值范围.
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对任意的a、b、c∈R
+,代数式
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的最小值为
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△ABC内接于以O为圆心半径为1的圆,且
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已知函数f(x)在定义域(0,+∞)上是单调函数,若对任意x∈(0,+∞),都有
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的取值范围是
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