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下列诱导公式中错误的是( ) A.tan(π-α)=-tanα B.cos(+α...
下列诱导公式中错误的是( )
A.tan(π-α)=-tanα
B.cos(
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+α)=sinα
C.sin(π+α)=-sinα
D.cos(π-α)=-cosα
考点分析:
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