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锐角三角形ABC中,a b c分别是三内角A B C的对边设B=2A,则的取值范...
锐角三角形ABC中,a b c分别是三内角A B C的对边设B=2A,则
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的取值范围是( )
A.(-2,2)
B.(0,2)
C.(
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,2)
D.(
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,
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)
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