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在△ABC中,A、B、C是它的三个内角,则A<B是tanA<tanB的( ) A...
在△ABC中,A、B、C是它的三个内角,则A<B是tanA<tanB的( )
A.充分不必要条件
B.必要不充分条件
C.充要条件
D.既不充分也不必要条件
考点分析:
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n是等差数列{a
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B.
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