化簡等於                                                  (...

來源:國語幫 1.18W

問題詳情:

化簡化簡等於                                                  (...等於                                                   (    ).

A. 化簡等於                                                  (... 第2張       B. 化簡等於                                                  (... 第3張            C.化簡等於                                                  (... 第4張          D.化簡等於                                                  (... 第5張

【回答】

B  由誘導公式易得A正確.

知識點:三角函數

題型:選擇題

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