若函数f(x)=sin(wx+阿发)+cos(wx+阿发)(w>0,绝对值阿发
若函数f(x)=sin(wx+阿发)+cos(wx+阿发)(w>0,绝对值阿发
数学人气:172 ℃时间:2020-04-25 05:42:09
优质解答
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...
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