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设sin,则 ( ) A.- B. - C . D .

设sin6ec8aac122bd4f6e,则6ec8aac122bd4f6e                                      (    )

A.-6ec8aac122bd4f6e           B. -6ec8aac122bd4f6e               C .6ec8aac122bd4f6e              D .6ec8aac122bd4f6e

 

 

A 【解析】略
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