已知:在△ABC中,a,b,c分别是角A、B、C所对的边,向量
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=(2
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sin
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,
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),
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=(sin(
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+
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),1)且
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•
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=
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.
(1)求角B的大小.(2)若角B为锐角,a=6,S
△ABC=6
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,求b的值.
考点分析:
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