题目

若函数f(x)=sin(wx+阿发)+cos(wx+阿发)(w>0,绝对值阿发

提问时间：2020-12-13

答案

f(x)=sin(wx+阿发)+cos(wx+阿发)=√2 [√2∕2 sin(wx+阿发) + √2∕2 cos(wx+阿发) ] （提取√2,根号2）=√2 [cos45°sin(wx+阿发) + sin45° cos(wx+阿发) ]=√2 sin(wx+阿发+45°) =√2 cos(wx+阿发- 45°) （因为...