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已知α为锐角,则m=sinα+cosα的值( ) A.m>1 B.m=1 C.m...
已知α为锐角,则m=sinα+cosα的值( )
A.m>1
B.m=1
C.m<1
D.m≥1
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A.
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B.
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C.
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D.
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在Rt△ABC中,若∠C=90°,AC=1,BC=2,则下列结论中正确的是( )
A.sinB=
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B.cosB=
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C.tanB=2
D.cotB=
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如图,tanα等于( )
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A.
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B.2
C.
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D.
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,则tanA=( )
A.
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B.
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C.
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D.24
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