已知,求的值;                                                ...

來源:國語幫 1.5W

問題詳情:

已知已知,求的值;                                                ...,求已知,求的值;                                                ... 第2張的值;                                                                                                                 

【回答】

已知,求的值;                                                ... 第3張

知識點:三角恆等變換

題型:解答題

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