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如何寻求解题的思路 新课标 人教版
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正弦定理a/sinA=b/sinBsinB=√2/2∵b=2
=√6^2-√2^2
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其他类似问题
（1）a/sinA=b/sinB(正弦定理)即√6/sin60°=2/sinBsinB=√2/2
或B=135°当B=135°时
∠A＋∠B=195°＞180°与三角形的内角和是180°矛盾∴B=45°
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