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關於A.等於的百科

等於(     )A.6     B、-6     C、-9     D、9
設a,b∈R,*{1,a+b,a}=,則b-a等於(  )A.1                      ...
等於 A.2                                           B.-2  ...
.等於(   )A.                B.                C.         ...
已知*等於                             A.                  ...
已知*等於                 (   )      A.                   ...
若,則等於     (           )      A.         B.             ...
 等於(  )A.    B.     C.     D.
等於(  )A.﹣  B.   C.﹣      D. 
  • 等於(  )A.﹣  B.   C.﹣      D. 

  • 問題詳情:等於()A.﹣  B.   C.﹣      D.【回答】B【考點】運用誘導公式化簡求值;根式與分數指數冪的互化及其化簡運算.【專題】計算題;轉化思想;三角函式的求值.【分析】由sin120°>0,去掉根號,利用誘導公式即可化簡求值.【解答】解:=sin120°=sin60°=.故選:B.【點評】本題主要考查...
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等於(  ) A.0                            B.               ...
等於(  )A.-       B.         C.    D.-
等於(  )A.     B.   C.  D.
cos(-)等於(  )A.             B.             C.-          ...
等於( )A.   B.    C.    D.
若,則等於A.                           B.                   ...
等於                      A.-            B.-             ...
 的值等於                                 (    )A.         ...
等於(   )A.  B.  C.  D.
若,則等於                                       (  )A.     ...
等於(  )A.       B.            C.               D.
等於                                     A.              ...
設*,*,則等於A.                            B.C.           ...
+等於                                               (  )A...
已知等於                                  A.               ...
在中,,,,則等於              (   )                    A.     ...