在
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,
,
,则
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20-21高三上·辽宁沈阳·阶段练习 查看更多[2]
更新时间:2020-11-13 05:04:46
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内角A,B,C的对边分别为a,b,c,若
,
,
,则
最大内角的余弦值是( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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