题目

已知，且，则__________． 答案：【答案】【解析】0＜x＜，且sin（2x﹣ ）= ，可得﹣＜2x﹣＜0，则cos（2x﹣）=，即有sin2x=sin[（2x﹣）+]= [sin（2x﹣）+cos（2x﹣）]=×（+）=，则sinx+cos =．故答案为：．根据句意和中文提示写出单词的正确形式。 1.When will you ___________(意识到) the importance of learning a foreign language? 2.Do you know we are in the twenty-first  ___________(世纪)? 3.---Who’s on TV?  ---The reporter is having an ______(采访) with the film star. 4.I know from my ____________(经验) how dangerous the trip will be. 5.Do you think what ___________(导致) the accident that day?